feat: Resource to create roles

[ANUGRAHG]

Purpose

Added role-specific resources in the provider for directory, global account, and subaccount.
This PR will resolve issue #841

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[x] Feature
[ ] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

How to Test

• Test the code via automated test

go test ./...

• Additional test steps

...

What to Check

Verify that the following are valid:

• Automated tests are executed successfully

• ...

Other Information

Checklist for reviewer

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• The PR has the matching labels assigned to it.
• The PR has a milestone assigned to it.
• If the PR closes an issue, the issue is referenced.
• Possible follow-up items are created and linked.

[lechnerc77]

The tests for the UPDATE and IMPORT operations should be added to the test cases to ensure that we cover all available operations in the tests.

In addition, I think the test cases need to be re-recorded as they currently run into errors.

[lechnerc77]

lgtm