Add Cloud Run Locations datasource

[upodroid]

Fixes: hashicorp/terraform-provider-google#7850

@ahmetb

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)

`google_cloud_run_locations`

[modular-magician]

Hello! I am a robot who works on Magic Modules PRs.

I have detected that you are a community contributor, so your PR will be assigned to someone with a commit-bit on this repo for initial review.

Thanks for your contribution! A human will be with you soon.

@rileykarson, please review this PR or find an appropriate assignee.

[modular-magician]

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

Diff report:

Terraform GA: Diff ( 13 files changed, 252 insertions(+), 20 deletions(-))
Terraform Beta: Diff ( 13 files changed, 252 insertions(+), 20 deletions(-))
TF OiCS: Diff ( 1 file changed, 1 insertion(+), 1 deletion(-))

[ahmetb]

Thanks a lot for this.

[ahmetb]

Is there a reason why we don't use strong types here? Locations response struct exists in run/v1 package.

[upodroid]

Hmm, it looks like the team is using raw HTTP calls instead of adding new google.golang.org/api packages for new datasources. It is messier though

https://github.com/GoogleCloudPlatform/magic-modules/blob/master/third_party/terraform/data_sources/data_source_monitoring_service.go

https://github.com/GoogleCloudPlatform/magic-modules/blob/master/third_party/terraform/data_sources/data_source_tpu_tensorflow_versions.go

[rileykarson]

In general it's fine either way- for example I want to say the TPU service library didn't exist yet, or we hadn't imported the service library and preferred not to.

[rileykarson]

In general it's fine either way- for example I want to say the TPU service library didn't exist yet, or we hadn't imported the service library and preferred not to.

[modular-magician]

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

Diff report:

Terraform GA: Diff ( 13 files changed, 252 insertions(+), 20 deletions(-))
Terraform Beta: Diff ( 13 files changed, 252 insertions(+), 20 deletions(-))
TF OiCS: Diff ( 1 file changed, 1 insertion(+), 1 deletion(-))

[modular-magician]

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

Diff report:

Terraform GA: Diff ( 13 files changed, 252 insertions(+), 20 deletions(-))
Terraform Beta: Diff ( 13 files changed, 252 insertions(+), 20 deletions(-))
TF OiCS: Diff ( 1 file changed, 1 insertion(+), 1 deletion(-))

[rileykarson]

/gcbrun

[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=165642"

[modular-magician]

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

Diff report:

Terraform GA: Diff ( 13 files changed, 252 insertions(+), 20 deletions(-))
Terraform Beta: Diff ( 13 files changed, 252 insertions(+), 20 deletions(-))
TF OiCS: Diff ( 1 file changed, 1 insertion(+), 1 deletion(-))

[modular-magician]

I have triggered VCR tests in RECORDING mode for the following tests that failed during VCR: TestAccDataSourceGoogleSubnetwork|TestAccDataSourceStorageBucketObjectContent_Basic|TestAccCloudRunServiceIamBindingGenerated|TestAccCloudRunServiceIamMemberGenerated|TestAccCloudRunServiceIamPolicyGenerated|TestAccActiveDirectoryDomainTrust_activeDirectoryDomainTrustBasicExample|TestAccCloudRunDomainMapping_cloudRunDomainMappingBasicExample|TestAccCloudRunService_cloudRunServiceMultipleEnvironmentVariablesExample|TestAccCloudRunService_cloudRunServiceBasicExample|TestAccCloudRunService_cloudRunServiceSqlExample|TestAccCloudRunService_cloudRunServiceNoauthExample|TestAccComputeRegionNetworkEndpointGroup_regionNetworkEndpointGroupCloudrunExample|TestAccContainerCluster_withConfidentialNodes|TestAccContainerCluster_withPrivateClusterConfigMissingCidrBlock|TestAccDataprocJob_Spark You can view the result here: "https://ci-oss.hashicorp.engineering/viewQueued.html?itemId=165649"

[ahmetb]

Thanks for contributing this. I personally really appreciate.
CC @imjasonh