[release-1.9] add controller: true to azure.json Secret ownerRef

[k8s-infra-cherrypick-robot]

This is an automated cherry-pick of #3811

/assign nojnhuh

Fixed a bug preventing azure.json Secrets from being reconciled

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.04% 🎉

Comparison is base (4ed93b9) 52.90% compared to head (3f8258c) 52.94%.
Report is 5 commits behind head on release-1.9.

Additional details and impacted files

@@               Coverage Diff               @@
##           release-1.9    #3818      +/-   ##
===============================================
+ Coverage        52.90%   52.94%   +0.04%     
===============================================
  Files              182      182              
  Lines            18250    18271      +21     
===============================================
+ Hits              9655     9674      +19     
- Misses            8055     8057       +2     
  Partials           540      540              

Files Changed	Coverage Δ
controllers/azurejson_machine_controller.go	47.68% <100.00%> (+0.34%)	⬆️
controllers/azurejson_machinepool_controller.go	51.07% <100.00%> (+0.35%)	⬆️
...ontrollers/azurejson_machinetemplate_controller.go	47.69% <100.00%> (+0.40%)	⬆️

... and 3 files with indirect coverage changes

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[nojnhuh]

I had to tweak this cherry-pick to use the pointer package instead of ptr since that change isn't going to be backported.

[mboersma]

/lgtm
/approve

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 04b00b0ef1733972084f9095471702620b93838c

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mboersma

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[nojnhuh]

/retest