add interface attribute to google_compute_disk

[megan07]

Fixes hashicorp/terraform-provider-google#7532

If this PR is for Terraform, I acknowledge that I have:

• Searched through the issue tracker for an open issue that this either resolves or contributes to, commented on it to claim it, and written "fixes {url}" or "part of {url}" in this PR description. If there were no relevant open issues, I opened one and commented that I would like to work on it (not necessary for very small changes).
• Generated Terraform, and ran make test and make lint to ensure it passes unit and linter tests.
• Ensured that all new fields I added that can be set by a user appear in at least one example (for generated resources) or third_party test (for handwritten resources or update tests).
• Ran relevant acceptance tests (If the acceptance tests do not yet pass or you are unable to run them, please let your reviewer know).
• Read the Release Notes Guide before writing my release note below.

Release Note Template for Downstream PRs (will be copied)

compute: added `interface` attribute to `google_compute_disk`

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 1 file changed, 6 insertions(+))
Terraform Beta: Diff ( 3 files changed, 71 insertions(+))
Inspec: Diff ( 4 files changed, 10 insertions(+))

[modular-magician]

I have triggered VCR tests based on this PR's diffs. See the results here: "https://ci-oss.hashicorp.engineering/viewQueued.html?itemId=152364"

[megan07]

/gcbrun

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 1 file changed, 6 insertions(+))
Terraform Beta: Diff ( 3 files changed, 71 insertions(+))
Inspec: Diff ( 4 files changed, 10 insertions(+))

[modular-magician]

I have triggered VCR tests based on this PR's diffs. See the results here: "https://ci-oss.hashicorp.engineering/viewQueued.html?itemId=152369"

[modular-magician]

I have triggered VCR tests in RECORDING mode for the following tests that failed during VCR: TestAccDataSourceComputeImage|TestAccDataSourceComputeImageFilter|TestAccDataSourceSpannerInstance_basic|TestAccComputeDiskIamBindingGenerated|TestAccComputeDiskIamMemberGenerated|TestAccComputeDiskIamPolicyGenerated|TestAccComputeRegionDiskIamBindingGenerated|TestAccComputeRegionDiskIamMemberGenerated|TestAccComputeRegionDiskIamPolicyGenerated|TestAccProviderMeta_setModuleName|TestAccComputeAttachedDisk_basic|TestAccComputeAttachedDisk_full|TestAccComputeAttachedDisk_count|TestAccComputeDisk_diskBasicExample|TestAccComputeDiskResourcePolicyAttachment_diskResourcePolicyAttachmentBasicExample|TestAccComputeDiskResourcePolicyAttachment_update|TestAccComputeDisk_update|TestAccComputeDisk_interface|TestAccComputeDisk_fromSnapshot|TestAccComputeDisk_encryption|TestAccComputeDisk_deleteDetach|TestAccComputeDisk_resourcePolicies|TestAccComputeDisk_encryptionKMS|TestAccComputeImage_withLicense|TestAccComputeImage_basedondisk|TestAccComputeInstanceFromTemplate_basic|TestAccComputeImage_sourceSnapshot|TestAccComputeImage_resolveImage|TestAccComputeInstanceFromTemplate_overrideBootDisk|TestAccComputeInstanceFromTemplate_overrideAttachedDisk|TestAccComputeInstanceFromTemplate_overrideScheduling|TestAccComputeInstanceFromTemplate_overrideScratchDisk|TestAccComputeInstanceTemplate_disks|TestAccComputeInstanceTemplate_disksInvalid|TestAccComputeInstance_diskEncryption|TestAccComputeInstance_diskEncryptionRestart|TestAccComputeInstance_attachedDisk|TestAccComputeInstance_attachedDisk_sourceUrl|TestAccComputeInstance_attachedDiskUpdate|TestAccComputeInstance_attachedDisk_modeRo|TestAccComputeInstance_bootDisk_source|TestAccComputeInstance_bootDisk_sourceUrl|TestAccComputeInstance_bootDisk_mode|TestAccComputeInstance_bootDisk_type|TestAccComputeInstance_kmsDiskEncryption|TestAccComputeInstance_forceNewAndChangeMetadata|TestAccComputeInstance_update|TestAccComputeInstance_serviceAccount|TestAccComputeInstance_scheduling|TestAccComputeInstance_subnet_auto|TestAccComputeInstance_soleTenantNodeAffinities|TestAccComputeInstance_networkIPAuto|TestAccComputeInstance_subnet_custom|TestAccComputeInstance_forceChangeMachineTypeManually|TestAccComputeInstance_network_ip_custom|TestAccComputeInstance_private_image_family|TestAccComputeInstance_multiNic|TestAccComputeInstance_deletionProtectionExplicitFalse|TestAccComputeInstance_deletionProtectionExplicitTrueAndUpdateFalse|TestAccComputeInstance_primaryAliasIpRange|TestAccComputeInstance_secondaryAliasIpRange|TestAccComputeInstance_hostname|TestAccComputeInstance_enableDisplay|TestAccComputeInstance_shieldedVmConfig|TestAccComputeInstance_desiredStatusUpdateBasic|TestAccComputeInstance_desiredStatusTerminatedUpdateFields|TestAccComputeInstance_updateRunning_desiredStatusRunning_allowStoppingForUpdate|TestAccComputeInstance_desiredStatusOnCreation|TestAccComputeInstance_updateRunning_desiredStatusTerminated_allowStoppingForUpdate|TestAccComputeInstance_updateRunning_desiredStatusRunning_notAllowStoppingForUpdate|TestAccComputeInstance_updateRunning_desiredStatusNotSet_notAllowStoppingForUpdate|TestAccComputeInstance_updateRunning_desiredStatusTerminated_notAllowStoppingForUpdate|TestAccComputeInstance_updateTerminated_desiredStatusTerminated_allowStoppingForUpdate|TestAccComputeInstance_updateTerminated_desiredStatusRunning_allowStoppingForUpdate|TestAccComputeInstance_updateTerminated_desiredStatusNotSet_allowStoppingForUpdate|TestAccComputeInstance_updateTerminated_desiredStatusNotSet_notAllowStoppingForUpdate|TestAccComputeInstance_updateTerminated_desiredStatusRunning_notAllowStoppingForUpdate|TestAccComputeMachineImage_machineImageBasicExample|TestAccComputeInstance_updateTerminated_desiredStatusTerminated_notAllowStoppingForUpdate|TestAccComputeInstance_subnetworkUpdate|TestAccComputeNodeGroup_nodeGroupBasicExample|TestAccComputeNodeGroup_nodeGroupAutoscalingPolicyExample|TestAccComputeNodeGroup_updateNodeTemplate|TestAccComputePerInstanceConfig_update|TestAccComputePacketMirroring_computePacketMirroringFullExample|TestAccComputeRegionAutoscaler_regionAutoscalerBasicExample|TestAccComputeRegionAutoscaler_update|TestAccComputeRegionAutoscaler_scaleDownControl|TestAccComputeRegionBackendService_regionBackendServiceBalancingModeExample|TestAccComputeRegionBackendService_withBackendInternal|TestAccComputeRegionBackendService_withBackendMultiNic|TestAccComputeRegionDisk_regionDiskBasicExample|TestAccComputeRegionBackendService_basic|TestAccComputeRegionDiskResourcePolicyAttachment_regionDiskResourcePolicyAttachmentBasicExample|TestAccComputeRegionDisk_basic|TestAccComputeRegionBackendService_withBackendInternalManaged|TestAccComputeRegionDisk_basicUpdate|TestAccComputeRegionDisk_encryption|TestAccComputeRegionDisk_deleteDetach|TestAccComputeRegionBackendService_ilbUpdateFull You can view the result here: "https://ci-oss.hashicorp.engineering/viewQueued.html?itemId=152388"