🌱 Remove homebrew action

[sbueringer]

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):
Part of #6613

[killianmuldoon]

/lgtm

[fabriziopandini]

/lgtm
/approve

Should we add a task to how release note to manually send a PR to update our brew formula with latest relese?

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: fabriziopandini

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[sbueringer]

Should we add a task to how release note to manually send a PR to update our brew formula with latest relese?

We can I assume it's bumping the clusterctl version to whatever is our latest stable release? https://github.com/Homebrew/homebrew-core/pull/105075/files

[fabriziopandini]

/cherry-pick release-1.2

[k8s-infra-cherrypick-robot]

@fabriziopandini: new pull request created: #6823

In response to this:

/cherry-pick release-1.2

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