Support ARC cluster types for workload identity

[anagg929]

Reason for Change:

This is the PR for supporting Workload identity in ARC cluster types. In ARC cluster types we are expecting the identity from a separate identity provider which are creating and maintaining secrets. The mutating web-hook is expected to mount a secret in this case.

Requirements

• squashed commits
• included documentation
• added unit tests and e2e tests (if applicable).

Issue Fixed:

Please answer the following questions with yes/no:

Does this change contain code from or inspired by another project? If so, did you notify the maintainers and provide attribution?

• yes
• no

Notes for Reviewers:

[codecov-commenter]

Codecov Report

Merging #918 (13fb315) into main (ba4a63e) will increase coverage by 2.34%.
The diff coverage is 68.62%.

@@            Coverage Diff             @@
##             main     #918      +/-   ##
==========================================
+ Coverage   51.76%   54.10%   +2.34%     
==========================================
  Files          36       36              
  Lines        2376     2336      -40     
==========================================
+ Hits         1230     1264      +34     
+ Misses       1100     1023      -77     
- Partials       46       49       +3     

Impacted Files	Coverage Δ
pkg/webhook/webhook.go	78.59% <68.62%> (-0.70%)	⬇️

... and 5 files with indirect coverage changes

[aramase]

Closing this PR as it's inactive and there are ongoing internal discussions.