Replace global ListInstance call with regional calls for IP reservation

[tyuchn]

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What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind api-change kind bug /kind cleanup /kind design /kind documentation /kind failing-test /kind feature /kind flake

What this PR does / why we need it: ListInstance call will return a partial result if any of the regions is unreachable, this will give us an incomplete list of allocated ip ranges. Create instance op will fail if customer specified ip range is occupied but not shown up in the ListInstance result. This PR replace global ListInstance call with regional calls only for allowed region. The driver will abort and fail earlier during list instance call before calling create filestore instance api. This will save resource and give us no surprise for unexpected instances. Which issue(s) this PR fixes:

Fixes #b/243699081

Special notes for your reviewer: Verified by manually tests. Provision single and multishare instances, both works well. https://screenshot.googleplex.com/C6B7s5s672fEyj6

Does this PR introduce a user-facing change?:

N/A

[k8s-ci-robot]

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: tyuchn Once this PR has been reviewed and has the lgtm label, please assign saad-ali for approval by writing /assign @saad-ali in a comment. For more information see:The Kubernetes Code Review Process.

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[leiyiz]

/ok-to-test

[saikat-royc]

As discussed we will revisit this post GA timeline

[k8s-ci-robot]

@tyuchn: PR needs rebase.

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/lifecycle stale

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/lifecycle rotten

[k8s-ci-robot]

@tyuchn: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-gcp-filestore-csi-driver-kubernetes-integration	b997149a39b351014c0d231bbdc57f09f6cc9727	link	true	/test pull-gcp-filestore-csi-driver-kubernetes-integration

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[k8s-triage-robot]

The Kubernetes project currently lacks enough active contributors to adequately respond to all issues and PRs.

This bot triages PRs according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
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/close

[k8s-ci-robot]

@k8s-triage-robot: Closed this PR.

In response to this:

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/close

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