backend/s3: Updates for Terraform v0.13.0 (#25134)
* deps: Update github.com/hashicorp/aws-sdk-go-base@v0.5.0
Updated via:
```
$ go get github.com/hashicorp/aws-sdk-go-base@v0.5.0
$ go mod tidy
$ go mod vendor
```
* backend/s3: Updates for Terraform v0.13.0
Reference: https://github.com/hashicorp/terraform/issues/13410
Reference: https://github.com/hashicorp/terraform/issues/18774
Reference: https://github.com/hashicorp/terraform/issues/19482
Reference: https://github.com/hashicorp/terraform/issues/20062
Reference: https://github.com/hashicorp/terraform/issues/20599
Reference: https://github.com/hashicorp/terraform/issues/22103
Reference: https://github.com/hashicorp/terraform/issues/22161
Reference: https://github.com/hashicorp/terraform/issues/22601
Reference: https://github.com/hashicorp/terraform/issues/22992
Reference: https://github.com/hashicorp/terraform/issues/24252
Reference: https://github.com/hashicorp/terraform/issues/24253
Reference: https://github.com/hashicorp/terraform/issues/24480
Reference: https://github.com/hashicorp/terraform/issues/25056
Changes:
```
NOTES
* backend/s3: Deprecated `lock_table`, `skip_get_ec2_platforms`, `skip_requesting_account_id` arguments have been removed
* backend/s3: Credential ordering has changed from static, environment, shared credentials, EC2 metadata, default AWS Go SDK (shared configuration, web identity, ECS, EC2 Metadata) to static, environment, shared credentials, default AWS Go SDK (shared configuration, web identity, ECS, EC2 Metadata)
* The `AWS_METADATA_TIMEOUT` environment variable no longer has any effect as we now depend on the default AWS Go SDK EC2 Metadata client timeout of one second with two retries
ENHANCEMENTS
* backend/s3: Always enable shared configuration file support (no longer require `AWS_SDK_LOAD_CONFIG` environment variable)
* backend/s3: Automatically expand `~` prefix for home directories in `shared_credentials_file` argument
* backend/s3: Add `assume_role_duration_seconds`, `assume_role_policy_arns`, `assume_role_tags`, and `assume_role_transitive_tag_keys` arguments
BUG FIXES
* backend/s3: Ensure configured profile is used
* backend/s3: Ensure configured STS endpoint is used during AssumeRole API calls
* backend/s3: Prefer AWS shared configuration over EC2 metadata credentials
* backend/s3: Prefer ECS credentials over EC2 metadata credentials
* backend/s3: Remove hardcoded AWS Provider messaging
```
Output from acceptance testing:
```
--- PASS: TestBackend (16.32s)
--- PASS: TestBackendConfig (0.58s)
--- PASS: TestBackendConfig_AssumeRole (0.02s)
--- PASS: TestBackendConfig_conflictingEncryptionSchema (0.00s)
--- PASS: TestBackendConfig_invalidKey (0.00s)
--- PASS: TestBackendConfig_invalidSSECustomerKeyEncoding (0.00s)
--- PASS: TestBackendConfig_invalidSSECustomerKeyLength (0.00s)
--- PASS: TestBackendExtraPaths (13.21s)
--- PASS: TestBackendLocked (28.98s)
--- PASS: TestBackendPrefixInWorkspace (5.65s)
--- PASS: TestBackendSSECustomerKey (17.60s)
--- PASS: TestBackend_impl (0.00s)
--- PASS: TestForceUnlock (17.50s)
--- PASS: TestKeyEnv (50.25s)
--- PASS: TestRemoteClient (4.78s)
--- PASS: TestRemoteClientLocks (16.85s)
--- PASS: TestRemoteClient_clientMD5 (12.08s)
--- PASS: TestRemoteClient_impl (0.00s)
--- PASS: TestRemoteClient_stateChecksum (17.92s)
```
ba081aa10a