Bump CAPI to v1.7.3

[mboersma]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

Updates CAPI to v1.7.3. Also bumps cert-manager to v1.15.0 to stay in sync with CAPI.

Which issue(s) this PR fixes:

N/A, but see #4974 for prior art.

Special notes for your reviewer:

• cherry-pick candidate

TODOs:

• squashed commits
• includes documentation
• adds unit tests

Release note:

Bump CAPI to v1.7.3

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 62.19%. Comparing base (de31bcc) to head (fe1027c).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4915      +/-   ##
==========================================
+ Coverage   62.18%   62.19%   +0.01%     
==========================================
  Files         201      201              
  Lines       16878    16878              
==========================================
+ Hits        10495    10497       +2     
+ Misses       5593     5591       -2     
  Partials      790      790              

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

[mboersma]

/cherry-pick release-1.15

[k8s-infra-cherrypick-robot]

@mboersma: once the present PR merges, I will cherry-pick it on top of release-1.15 in a new PR and assign it to you.

In response to this:

/cherry-pick release-1.15

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.

[nojnhuh]

/lgtm
/approve

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: dc0d8272f9a7f533056be838c78739303bf986de

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: nojnhuh

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• OWNERS [nojnhuh]

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[nojnhuh]

known flake #4264
/retest

[k8s-infra-cherrypick-robot]

@mboersma: #4915 failed to apply on top of branch "release-1.15":

Applying: Bump CAPI to v1.7.3
Using index info to reconstruct a base tree...
M	Makefile
M	Tiltfile
M	go.mod
M	go.sum
M	test/e2e/config/azure-dev.yaml
Falling back to patching base and 3-way merge...
Auto-merging test/e2e/config/azure-dev.yaml
CONFLICT (content): Merge conflict in test/e2e/config/azure-dev.yaml
Auto-merging go.sum
Auto-merging go.mod
Auto-merging Tiltfile
CONFLICT (content): Merge conflict in Tiltfile
Auto-merging Makefile
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 Bump CAPI to v1.7.3
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherry-pick release-1.15

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.