[release-1.11] add transient error handling to AMMP delete

[k8s-infra-cherrypick-robot]

This is an automated cherry-pick of #4039

/assign nojnhuh

Fixed a bug causing transient errors in AzureManagedMachinePool reconciliation to requeue too aggressively

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (1846b96) 56.63% compared to head (8d2e5f5) 56.65%.
Report is 1 commits behind head on release-1.11.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.11    #4047      +/-   ##
================================================
+ Coverage         56.63%   56.65%   +0.02%     
================================================
  Files               187      187              
  Lines             19131    19139       +8     
================================================
+ Hits              10834    10844      +10     
+ Misses             7668     7666       -2     
  Partials            629      629              

Files	Coverage Δ
controllers/azuremanagedmachinepool_controller.go	56.14% <66.66%> (+1.14%)	⬆️

... and 1 file with indirect coverage changes

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[mboersma]

/lgtm
/approve

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: fdb7a08f41d6ff4b2fbca8a9bdc0fd7900af75bf

[k8s-ci-robot]

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