VPC SC dry-run mode

[drebes]

Release Note Template for Downstream PRs (will be copied)

accesscontextmanager: added `spec` and `use_explicit_dry_run_spec` to `google_access_context_manager_service_perimeter` to test perimeter configurations in dry-run mode.

[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, 425 insertions(+), 5 deletions(-))
Terraform Beta: Diff ( 3 files changed, 425 insertions(+), 5 deletions(-))
TF Conversion: Diff ( 1 file changed, 102 insertions(+))
Inspec: Diff ( 6 files changed, 109 insertions(+))

[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, 433 insertions(+), 5 deletions(-))
Terraform Beta: Diff ( 3 files changed, 433 insertions(+), 5 deletions(-))
TF Conversion: Diff ( 1 file changed, 102 insertions(+))
Inspec: Diff ( 6 files changed, 109 insertions(+))

[rileykarson]

Thanks! LGTM.