BIA/RIAv2 -- distinguish between New and InProgress operations

[sseago]

Add a new OperationPhase to distinguish between New and InProgress operations.

Fixes #(issue)

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 #6012 (433d2d5) into main (29b5894) will decrease coverage by 0.09%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main    #6012      +/-   ##
==========================================
- Coverage   41.39%   41.30%   -0.09%     
==========================================
  Files         252      252              
  Lines       23361    23377      +16     
==========================================
- Hits         9671     9657      -14     
- Misses      12940    12962      +22     
- Partials      750      758       +8     

Impacted Files	Coverage Δ
pkg/controller/backup_operations_controller.go	46.51% <45.45%> (-4.29%)	⬇️
pkg/controller/restore_operations_controller.go	47.47% <45.45%> (-4.70%)	⬇️
pkg/backup/item_backupper.go	73.28% <100.00%> (ø)
pkg/restore/restore.go	64.86% <100.00%> (ø)

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