## Description
> Updating the graphics for the Access control upgrade page. Also,
removing the feature flag.
Fixes [#19072](https://github.com/appsmithorg/appsmith/issues/19072)
## Type of change
- Uptaing images
## How Has This Been Tested?
> Locally checked that the new images are being used
- Manual
## Checklist:
### Dev activity
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my own code
- [x] I have commented my code, particularly in hard-to-understand areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] PR is being merged under a feature flag
### QA activity:
- [ ] Test plan has been approved by relevant developers
- [ ] Test plan has been peer reviewed by QA
- [ ] Cypress test cases have been added and approved by either SDET or
manual QA
- [ ] Organized project review call with relevant stakeholders after
Round 1/2 of QA
- [ ] Added Test Plan Approved label after reveiwing all Cypress test
* updated upgrade flow for authentication page to start using upgrade hook
* using the upgrade hook on upgrade pages as well
* adding RBAC feature flag
* updated content for access control upgrade page
* added feature flag and moved content to message constants
* adding feature flag for RBAC
* updated some styles
* added a missing comma
* removed width on trigger details container
* updated some styles
