Disable groups by default and Some optimizations

- Put groups support behind a feature flag, and disabled by default.
  The reason is that it has some known issues, but we want to keep
  optimizing this feature. Putting it behind a feature flag could help
  some users, and the developers into optimizing this feature without to
  much trouble.

Further:

- Updates Rust to v1.66.0
- Updated GHA workflows
- Updated Alpine to 3.17
- Updated jquery to v3.6.2
- Moved jdenticon.js to load at the bottom, fixes an issue on chromium
- Added autocomplete attribute to admin login password field
- Added some extra CSP options (Tested this on Safari, Firefox, Chrome, Bitwarden Desktop)
- Moved uppercase convertion from runtime to compile-time using `paste`
  for building the environment variables, lowers heap allocations.