Add role memberships endpoint

[gl-johnson]

Desired Outcome

Support the Role Membership endpoint. Default behavior should use the recursive membership method (?all), but also support direct membership only queries (?memberships).

Implemented Changes

Added the following URL template and relevant API methods to return a JSON list of role memberships: ROLES_MEMBERSHIPS = "{url}/roles/{account}/{kind}/{identifier}?{membership}"

Connected Issue/Story

CyberArk internal issue link: ONYX-24035

Definition of Done

At least 1 todo must be completed in the sections below for the PR to be merged.

Changelog

• [x] The CHANGELOG has been updated, or
• [ ] This PR does not include user-facing changes and doesn't require a CHANGELOG update

Test coverage

• [x] This PR includes new unit and integration tests to go with the code changes, or
• [ ] The changes in this PR do not require tests

Documentation

• [x] Docs (e.g. READMEs) were updated in this PR
• [ ] A follow-up issue to update official docs has been filed here: [insert issue ID]()
• [ ] This PR does not require updating any documentation

Behavior

• [ ] This PR changes product behavior and has been reviewed by a PO, or
• [x] These changes are part of a larger initiative that will be reviewed later, or
• [ ] No behavior was changed with this PR

Security

• [ ] Security architect has reviewed the changes in this PR,
• [x] These changes are part of a larger initiative with a separate security review, or
• [ ] There are no security aspects to these changes

[szh]

Looks good. I just want to wait until you have a draft PR in the CLI so I can see the integration tests and verify the output is the same as in the Ruby API.

[gl-johnson]

CLI PR with integration tests