Add Role endpoint

[gl-johnson]

Desired Outcome

Add support for Conjur's Role endpoint.

Implemented Changes

• Define URI pattern for Role requests
• Add wrapper function to generate API calls
• Add relevant unit tests

Connected Issue/Story

Supports ONYX-23085

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]

Code looks great. Just waiting for a draft PR in cyberark-conjur-cli to validate this against an actual conjur instance with integration tests.

[gl-johnson]

cyberark-conjur-cli PR with integration tests