✨Feature/multiple subnets

[memorais]

What this PR does / why we need it:

This creates the possibility of use multiple subnets inside one network. OpenStack provides this functionality and we need this to not break reconciliation process if OpenStack administrators add new subnet inside a network already used by OpenStack cluster-api provider.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #3160

Special notes for your reviewer:

1. Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

TODOs:

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

/hold

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: memorais / name: Matheus Morais (59ebc7f, 731f9c5, ad1f617, bcc86f8)

[k8s-ci-robot]

Welcome @memorais!

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[k8s-ci-robot]

Hi @memorais. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work.

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[nikParasyr]

/ok-to-test