data-source/aws_iam_role: Add max_session_duration attribute

[bflad]

New max_session_duration attribute was added in master to the aws_iam_role resource but not the data source:

=== RUN   TestAccAWSDataSourceIAMRole_basic
--- FAIL: TestAccAWSDataSourceIAMRole_basic (6.81s)
    testing.go:518: Step 0 error: Error applying: 1 error(s) occurred:
        
        * data.aws_iam_role.test: data.aws_iam_role.test: Invalid address to set: []string{"max_session_duration"}
    testing.go:579: Error destroying resource! WARNING: Dangling resources
        may exist. The full state and error is shown below.
        
        Error: Error refreshing: 1 error(s) occurred:
        
        * data.aws_iam_role.test: 1 error(s) occurred:
        
        * data.aws_iam_role.test: data.aws_iam_role.test: Invalid address to set: []string{"max_session_duration"}
        
        State: <nil>
FAIL

Now:

make testacc TEST=./aws TESTARGS='-run=TestAccAWSDataSourceIAMRole_basic'
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./aws -v -run=TestAccAWSDataSourceIAMRole_basic -timeout 120m
=== RUN   TestAccAWSDataSourceIAMRole_basic
--- PASS: TestAccAWSDataSourceIAMRole_basic (11.83s)
PASS
ok  	github.com/terraform-providers/terraform-provider-aws/aws	11.877s

[tombuildsstuff]

LGTM 👍

[bflad]

This has been released in version 1.14.0 of the AWS provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. Thanks!