fix: account list throttling issue in CreateVolume

[andyzhangx]

What type of PR is this?
/kind bug

What this PR does / why we need it:
fix: account list throttling issue in CreateVolume

Which issue(s) this PR fixes:

Fixes #432

Requirements:

• uses conventional commit messages
• includes documentation
• adds unit tests
• tested upgrade from previous version

Special notes for your reviewer:
After the fix, I found it’s throttled in creating file share on 128th PVCs, we use management API(through SRP) to create file share by default, so it looks like using bring your own storage account feature is the only way to create 1000 PVCs in parallel now. bring your own storage account feature uses account key to create file share, it works well in creating 1000 PVCs in parallel, so in that scenario, let’s ask customer to use bring own storage account key way.

W0919 00:26:51.776624 1 controllerserver.go:207] CreateFileShare(pvc-240a9046-678c-4d9c-a0a2-cfc7774db83a) on account(fuse9490b501ea8244d0849) failed with error(failed to get file share(pvc-240a9046-678c-4d9c-a0a2-cfc7774db83a), err: storage.FileSharesClient#Get: Failure responding to request: StatusCode=429 -- Original Error: autorest/azure: Service returned an error. Status=429 Code="TooManyRequests" Message="The request is being throttled as the limit has been reached for operation type - Read_ObservationWindow_00:05:00. For more information, see - https://aka.ms/srpthrottlinglimits"), waiting for retring

Release note:

fix: account list throttling issue in CreateVolume

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