Restore Item Action v2 API implementation

[sseago]

Thank you for contributing to Velero!

Please add a summary of your change

This PR implements the RestoreItemAction v2 API design.

Does your change fix a particular issue?

Fixes #5063

Please indicate you've done the following:

• [x ] Accepted the DCO. Commits without the DCO will delay acceptance.
• [ x] Created a changelog file or added /kind changelog-not-required as a comment on this pull request.
• Updated the corresponding documentation in site/content/docs/main.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 53.29341% with 78 lines in your changes missing coverage. Please review.

Project coverage is 40.76%. Comparing base (ab642ff) to head (9f6f13f).
Report is 2100 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/plugin/framework/server.go	0.00%	28 Missing ⚠️
...reitemaction/v2/restartable_restore_item_action.go	67.10%	25 Missing ⚠️
pkg/plugin/framework/action_resolver.go	0.00%	21 Missing ⚠️
pkg/plugin/clientmgmt/manager.go	88.88%	2 Missing and 1 partial ⚠️
pkg/plugin/framework/common/plugin_kinds.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5569      +/-   ##
==========================================
+ Coverage   40.67%   40.76%   +0.09%     
==========================================
  Files         243      244       +1     
  Lines       21035    21172     +137     
==========================================
+ Hits         8555     8631      +76     
- Misses      11857    11917      +60     
- Partials      623      624       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.