Update CAPI to v1.5.1

[mboersma]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

Updates CAPI references to use the new v1.5.1 release.

Which issue(s) this PR fixes:

N/A

Special notes for your reviewer:

• cherry-pick candidate

TODOs:

• squashed commits
• includes documentation
• adds unit tests

Release note:

Update CAPI to v1.5.1

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (34aa125) 55.55% compared to head (09894a5) 55.55%.
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3908   +/-   ##
=======================================
  Coverage   55.55%   55.55%           
=======================================
  Files         190      190           
  Lines       19532    19532           
=======================================
  Hits        10851    10851           
  Misses       8071     8071           
  Partials      610      610           

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[CecileRobertMichon]

/lgtm
/approve
/hold

for other reviews and optional tests, feel free to unhold when ready ^

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 88fec4f3dafcc0b8a956af56ab29daa16a651e46

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: CecileRobertMichon

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• OWNERS [CecileRobertMichon]

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[mboersma]

/test pull-cluster-api-provider-azure-e2e-optional

[mboersma]

/hold cancel