[release-1.12] AzureManagedMachinePool ValidateDelete Webhook will check AMMP for DeleteForMoveAnnotation annotation

[k8s-infra-cherrypick-robot]

This is an automated cherry-pick of #4392

/assign nawazkh

AzureManagedMachinePool will check its annotations for `DeleteForMoveAnnotation` during clusterctl move operation

[nawazkh]

/lgtm

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: e1c2ac3c09f6dc5bb0a1c30c95cdcc2a9953d73b

[codecov]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (e85cf2d) 59.74% compared to head (dc7ebf7) 59.77%.
Report is 1 commits behind head on release-1.12.

Files	Patch %	Lines
api/v1beta1/azuremanagedmachinepool_webhook.go	50.00%	2 Missing ⚠️
...v1beta1/azuremanagedmachinepooltemplate_webhook.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.12    #4396      +/-   ##
================================================
+ Coverage         59.74%   59.77%   +0.02%     
================================================
  Files               192      192              
  Lines             19313    19313              
================================================
+ Hits              11539    11544       +5     
+ Misses             7144     7140       -4     
+ Partials            630      629       -1     

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[nojnhuh]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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