✨ allow switching from filter.name to id of network and subnets in OSC spec

[okozachenko1203]

What this PR does / why we need it:
This PR allows switching from spec.network.filter.name to spec.network.id in OpenstackCluster webhook.
Same for spec.subnets.
Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):

Special notes for your reviewer:

TODOs:

• squashed commits
• if necessary:
  • includes documentation
  • adds unit tests

/hold

[k8s-ci-robot]

Hi @okozachenko1203. Thanks for your PR.

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[lentzi90]

/ok-to-test
Seems safe and ok to me
/lgtm

[lentzi90]

I think the test failure is due to a typo. It should be capital N in Spec.Network

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[mnaser]

@okozachenko1203 do you think we can somehow exercise this in any sort of test to allow validating the change?

[mnaser]

Looking at the tests, I see we can use this here:

https://github.com/kubernetes-sigs/cluster-api-provider-openstack/blob/main/pkg/webhooks/openstackcluster_webhook_test.go

[okozachenko1203]

/ok-to-test

[mnaser]

/ok-to-test

@okozachenko1203 just FYI, you need to be a member of the kubernetes-sigs GitHub org in order to be able to run that.

[mnaser]

/lgtm

[EmilienM]

I'm not against this PR but why don't we also do Subnets and other resources in that case?

[lentzi90]

Please squash the commits.
@EmilienM also has a good point. Why do it only for network? We could do this for all resources that follow the same pattern

[k8s-ci-robot]

New changes are detected. LGTM label has been removed.

[okozachenko1203]

@EmilienM @lentzi90 please review again