RTD Updates for Policy Executor Integration

RTD Updates for Policy Executor Integration

- Updated page describing Policy Executor feature
- Updated deployment page, added config parameters for Policy Executor
- Corrected release note: Jira for Policy Executor should not have been included before
- Clean up release note: removed redundant version mentioning
- Clean up tables on deployment page: removed redundant empty lines

Issue-ID: CPS-2443
Change-Id: I5750868b6c29e9de29cd08521b8efffff4f37eaf
Signed-off-by: ToineSiebelink <toine.siebelink@est.tech>