Restore Item Action v2 API implementation

[sseago]

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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

Merging #5569 (c629079) into main (5c98e88) will decrease coverage by 0.05%.
The diff coverage is 38.36%.

@@            Coverage Diff             @@
##             main    #5569      +/-   ##
==========================================
- Coverage   40.90%   40.84%   -0.06%     
==========================================
  Files         239      244       +5     
  Lines       20624    21129     +505     
==========================================
+ Hits         8437     8631     +194     
- Misses      11570    11874     +304     
- Partials      617      624       +7     

Impacted Files	Coverage Δ
pkg/backup/request.go	100.00% <ø> (ø)
pkg/plugin/framework/action_resolver.go	5.00% <0.00%> (-1.90%)	⬇️
...ramework/backupitemaction/v2/backup_item_action.go	0.00% <0.00%> (ø)
...k/backupitemaction/v2/backup_item_action_client.go	0.00% <0.00%> (ø)
pkg/plugin/framework/common/plugin_kinds.go	0.00% <0.00%> (ø)
pkg/plugin/framework/server.go	0.00% <0.00%> (ø)
...k/backupitemaction/v2/backup_item_action_server.go	33.06% <33.06%> (ø)
...kupitemaction/v2/restartable_backup_item_action.go	65.21% <65.21%> (ø)
...reitemaction/v2/restartable_restore_item_action.go	67.10% <67.10%> (ø)
pkg/plugin/clientmgmt/manager.go	80.08% <88.88%> (+2.68%)	⬆️
... and 7 more

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