Adding support for zone and region via env

[prateek2408]

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

• [X ] 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).
• [x ] Generated Terraform, and ran make test and make lint to ensure it passes unit and linter tests.
  .

Release Note Template for Downstream PRs (will be copied)

This is fix for Issue- GoogleCloudPlatform/terraform-validator#463

[modular-magician]

Oops! It looks like you're using an unknown release-note type in your changelog entries:

• REPLACEME

Please only use the types listed in https://github.com/GoogleCloudPlatform/magic-modules/blob/master/.ci/RELEASE_NOTES_GUIDE.md.

[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:

TF Validator: Diff ( 2 files changed, 60 insertions(+))

[ScottSuarez]

Looks like the fields here won't compile due to the struct not being declared correctly ^-^

[modular-magician]

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

Diff report:

TF Validator: Diff ( 2 files changed, 60 insertions(+))

[modular-magician]

I have triggered VCR tests in RECORDING mode for the following tests that failed during VCR: TestAccDatasourceGoogleServiceNetworkingPeeredDnsDomain_basic|TestAccApigeeEnvironmentIamBindingGenerated|TestAccApigeeEnvironmentIamMemberGenerated|TestAccCloudbuildWorkerPool_basic|TestAccComputeGlobalForwardingRule_externalCndLbWithBackendBucketExample|TestAccServiceNetworkingPeeredDNSDomain_basic You can view the result here: https://ci-oss.hashicorp.engineering/viewQueued.html?itemId=249165

[ScottSuarez]

Looks like tests are failing, could you try running the unit tests locally

FAIL	github.com/GoogleCloudPlatform/terraform-validator/converters/google/resources [build failed]
ok  	github.com/GoogleCloudPlatform/terraform-validator/converters/google	0.234s
ok  	github.com/GoogleCloudPlatform/terraform-validator/cmd	0.065s
ok  	github.com/GoogleCloudPlatform/terraform-validator/ancestrymanager	0.101s
?   	github.com/GoogleCloudPlatform/terraform-validator	[no test files]
converters/google/resources/iam_cloud_functions_cloud_function.go:113:12: too many errors
	previous declaration at converters/google/resources/utils.go:59:66
converters/google/resources/getconfig_test.go:28:6: getRegion redeclared in this block
	previous declaration at converters/google/resources/regional_utils.go:29:64
converters/google/resources/getconfig_test.go:25:6: getZone redeclared in this block
	want (*Config)
	have (*schema.ResourceData, *Config)
converters/google/resources/iam_cloud_functions_cloud_function.go:113:24: too many arguments in call to getRegion
converters/google/resources/iam_cloud_functions_cloud_function.go:113:12: assignment mismatch: 2 variables but getRegion returns 1 values
	want (*Config)
	have (TerraformResourceData, *Config)
converters/google/resources/iam_cloud_functions_cloud_function.go:63:24: too many arguments in call to getRegion
converters/google/resources/iam_cloud_functions_cloud_function.go:63:12: assignment mismatch: 2 variables but getRegion returns 1 values
	want (*Config)
	have (TerraformResourceData, *Config)
converters/google/resources/compute_region_disk_resource_policy_attachment.go:71:26: too many arguments in call to getRegion
converters/google/resources/compute_region_disk_resource_policy_attachment.go:71:14: assignment mismatch: 2 variables but getRegion returns 1 values
	want (*Config)
	have (TerraformResourceData, *Config)
converters/google/resources/compute_disk_resource_policy_attachment.go:71:22: too many arguments in call to getZone
converters/google/resources/compute_disk_resource_policy_attachment.go:71:12: assignment mismatch: 2 variables but getZone returns 1 values

[modular-magician]

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

Diff report:

TF Validator: Diff ( 2 files changed, 60 insertions(+))

[modular-magician]

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

Diff report:

TF Validator: Diff ( 2 files changed, 60 insertions(+))

[ScottSuarez]

/gcbrun

[modular-magician]

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

Diff report:

TF Validator: Diff ( 2 files changed, 60 insertions(+))