make internal LB private IP configurable

[nawazkh]

What type of PR is this?
/kind feature

What this PR does / why we need it:

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #5264

Special notes for your reviewer:

• cherry-pick candidate

TODOs:

• squashed commits
• includes documentation
• adds unit tests

Release note:

make Internal LB private configurable

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[codecov]

Codecov Report

Attention: Patch coverage is 88.67925% with 6 lines in your changes missing coverage. Please review.

Project coverage is 52.81%. Comparing base (ec18b58) to head (5b36afb).

Files with missing lines	Patch %	Lines
api/v1beta1/azurecluster_default.go	76.47%	3 Missing and 1 partial ⚠️
api/v1beta1/azurecluster_validation.go	94.44%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5269      +/-   ##
==========================================
+ Coverage   52.78%   52.81%   +0.03%     
==========================================
  Files         270      270              
  Lines       29057    29084      +27     
==========================================
+ Hits        15337    15360      +23     
- Misses      12928    12931       +3     
- Partials      792      793       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[k8s-ci-robot]

@nawazkh: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-cluster-api-provider-azure-verify	5b36afb	link	true	/test pull-cluster-api-provider-azure-verify
pull-cluster-api-provider-azure-e2e	5b36afb	link	true	/test pull-cluster-api-provider-azure-e2e

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[nawazkh]

/close since I can only test this with #5248

[nawazkh]

/close

[k8s-ci-robot]

@nawazkh: Closed this PR.

In response to this:

/close

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[nawazkh]

/reopen

[k8s-ci-robot]

@nawazkh: Failed to re-open PR: state cannot be changed. The make_private_lb_ip_configurable branch was force-pushed or recreated.

In response to this:

/reopen

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