Add Organization/Project IAM Policy/Binding resources

[dadgar]

🛠️ Description

Add Organization/Project IAM Policy/Binding resources:

• data.hcp_iam_policy
• hcp_organization_iam_policy
• hcp_organization_iam_binding
• hcp_project_iam_policy
• hcp_project_iam_binding

These resources are implemented through a common interface that will allow us to extend the IAM resources to other objects in a consistent and performant way.

🏗️ Acceptance tests

• Are there any feature flags that are required to use this functionality? No
• Have you added an acceptance test for the functionality being added? Yes
• Have you run the acceptance tests on this branch? Yes

Output from acceptance testing:

$ TF_ACC=1 go test -v
=== RUN   TestAccIAMPolicyDataSource
--- PASS: TestAccIAMPolicyDataSource (19.39s)
=== RUN   TestAccIAMPolicyDataSource_Validation
--- PASS: TestAccIAMPolicyDataSource_Validation (1.33s)
=== RUN   TestAccOrganizationDataSource
--- PASS: TestAccOrganizationDataSource (7.65s)
=== RUN   TestAccProjectDataSource
--- PASS: TestAccProjectDataSource (17.65s)
=== RUN   TestAccOrganizationIamBindingResource
--- PASS: TestAccOrganizationIamBindingResource (24.79s)
=== RUN   TestAccProjectIamPolicyResource
--- PASS: TestAccProjectIamPolicyResource (22.12s)
=== RUN   TestAccProjectIamBindingResource
--- PASS: TestAccProjectIamBindingResource (25.76s)
=== RUN   TestAccProjectResource
--- PASS: TestAccProjectResource (21.87s)
PASS
ok      github.com/hashicorp/terraform-provider-hcp/internal/provider/resourcemanager   141.000s