Allow url map to handle backend service fields that can also be backend buckets.

[nat-henderson]

Fixes hashicorp/terraform-provider-google#7886.

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: `google_compute_url_map`'s fields referring to backend services can now also refer to backend buckets.

[modular-magician]

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

Diff report:

Terraform GA: Diff ( 5 files changed, 70 insertions(+), 137 deletions(-))
Terraform Beta: Diff ( 5 files changed, 70 insertions(+), 137 deletions(-))
Ansible: Diff ( 4 files changed, 176 insertions(+), 218 deletions(-))
TF Conversion: Diff ( 2 files changed, 6 insertions(+), 30 deletions(-))
Inspec: Diff ( 1 file changed, 3 insertions(+), 3 deletions(-))

[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=159891"

[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, 342 insertions(+), 13 deletions(-))
Terraform Beta: Diff ( 1 file changed, 342 insertions(+), 13 deletions(-))
TF Conversion: Diff ( 1 file changed, 342 insertions(+), 14 deletions(-))

[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=159897"

[nat-henderson]

Tests pass! Do you want to see new tests for this, and if so, what would you like to see?
https://ci-oss.hashicorp.engineering/buildConfiguration/GoogleCloudBeta_ProviderGoogleCloudBetaMmUpstream/159898?buildTab=tests&status=all&pager.currentPage=1

[modular-magician]

I have triggered VCR tests in RECORDING mode for the following tests that failed during VCR: TestAccDataSourceSpannerInstance_basic|TestAccActiveDirectoryDomainTrust_activeDirectoryDomainTrustBasicExample|TestAccBigqueryDataTransferConfig|TestAccComposerEnvironment_withUpdateOnCreate|TestAccComputeGlobalForwardingRule_globalForwardingRuleHttpExample|TestAccComputeGlobalForwardingRule_globalForwardingRuleInternalExample|TestAccComputeManagedSslCertificate_managedSslCertificateBasicExample|TestAccComputeTargetGrpcProxy_targetGrpcProxyBasicExample|TestAccComputeTargetGrpcProxy_update|TestAccComputeTargetHttpProxy_targetHttpProxyBasicExample|TestAccComputeTargetHttpsProxy_targetHttpsProxyBasicExample|TestAccComputeUrlMap_urlMapBasicExample|TestAccComputeUrlMap_urlMapTrafficDirectorRouteExample|TestAccComputeUrlMap_urlMapTrafficDirectorRoutePartialExample|TestAccComputeUrlMap_urlMapHeaderBasedRoutingExample|TestAccComputeUrlMap_urlMapTrafficDirectorPathExample|TestAccComputeUrlMap_urlMapTrafficDirectorPathPartialExample|TestAccComputeUrlMap_urlMapParameterBasedRoutingExample|TestAccComputeUrlMap_defaultRouteActionTrafficDirectorPathUpdate|TestAccComputeUrlMap_defaultRouteActionTrafficDirectorUpdate|TestAccComputeUrlMap_trafficDirectorPathUpdate|TestAccContainerNodePool_basic|TestAccContainerNodePool_nodeLocations|TestAccContainerNodePool_withInvalidUpgradeSettings|TestAccContainerNodePool_maxPodsPerNode|TestAccContainerNodePool_withNodeConfig|TestAccContainerNodePool_withGPU|TestAccContainerNodePool_withLinuxNodeConfig|TestAccContainerNodePool_withUpgradeSettings|TestAccContainerNodePool_withKubeletConfig|TestAccContainerNodePool_withNodeConfigScopeAlias|TestAccContainerNodePool_withSandboxConfig|TestAccContainerNodePool_withWorkloadIdentityConfig|TestAccContainerNodePool_regionalAutoscaling|TestAccContainerNodePool_withManagement|TestAccContainerNodePool_autoscaling|TestAccContainerNodePool_resize|TestAccContainerNodePool_regionalClusters|TestAccContainerNodePool_shieldedInstanceConfig|TestAccContainerNodePool_012_ConfigModeAttr|TestAccContainerNodePool_EmptyGuestAccelerator|TestAccFilestoreInstance_filestoreInstanceBasicExample|TestAccFilestoreInstance_update|TestAccOSLoginSSHPublicKey_osLoginSshKeyExpiry You can view the result here: "https://ci-oss.hashicorp.engineering/viewQueued.html?itemId=159981"

[rileykarson]

I think we could refer to a backend bucket in a couple of the newly-supported fields in a test, unless there's already an example.

[rileykarson]

Mind adding a comment here explaining what patterns we match on, and what values we provide if so?

[nat-henderson]

Done!

[nat-henderson]

Lucky for me there was already a test - expanded it to test all the new fields also.

[modular-magician]

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

Diff report:

Terraform GA: Diff ( 3 files changed, 352 insertions(+), 41 deletions(-))
Terraform Beta: Diff ( 3 files changed, 352 insertions(+), 41 deletions(-))
TF Conversion: Diff ( 1 file changed, 342 insertions(+), 14 deletions(-))
TF OiCS: Diff ( 1 file changed, 5 insertions(+), 14 deletions(-))

[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=160862"