Updating helm docs with additionalVault and ACLs refactor functionali…

…ty. (#12669)

* Updating helm docs with additionalVault and ACLs refactor funtionality.

* PR Feedback corrections.

- Fix indentation.
- Fix description of secretName and secretKey to be consistent
- Change description of manageACLsRole to be more clear.
- Make the added vault role field descriptions consistent

* PR Feedback - correcting description for adminPartitionsRole

* Fixing broken shell sessions

* Fixing broken shell sessions by changing shell-session tobecloser tocomment marker