Support new backup restore statuses

[parkerduckworth]

In support of server PR #10135, this introduces two new restore status values: CANCELLING and FINALIZING

[orca-security-eu]

Orca Security Scan Summary

Status	Check	Issues by priority
Passed	Infrastructure as Code	0   0   0   0	View in Orca
Passed	SAST	0   0   0   0	View in Orca
Passed	Secrets	0   0   0   0	View in Orca
Passed	Vulnerabilities	0   0   0   0	View in Orca

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.39%. Comparing base (dac5bd7) to head (a486fef).
⚠️ Report is 113 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1930      +/-   ##
==========================================
- Coverage   86.56%   86.39%   -0.18%     
==========================================
  Files         273      274       +1     
  Lines       19777    19981     +204     
==========================================
+ Hits        17120    17262     +142     
- Misses       2657     2719      +62     

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