release-1.33: Backport: provisioner: Increase CPU limit for shutdown-manager (#7382)

[tsaarni]

Cherry-picking #7382 for release-1.33 as requested here #7366 (comment)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.85%. Comparing base (bdca86d) to head (600f4f4).
⚠️ Report is 2 commits behind head on release-1.33.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.33    #7407      +/-   ##
================================================
+ Coverage         81.13%   81.85%   +0.71%     
================================================
  Files               130      130              
  Lines             15795    15747      -48     
================================================
+ Hits              12815    12889      +74     
+ Misses             2622     2574      -48     
+ Partials            358      284      -74     

Files with missing lines	Coverage Δ
...nternal/provisioner/objects/dataplane/dataplane.go	87.67% <ø> (ø)

... and 5 files with indirect coverage changes

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