Fix the resilientQuery to give correct results during initialization

[GuptaManan100]

Description

This PR fixes the bug described in #13079. Earlier, in resilientQuery, if we saw that we don't need to refresh the local cache information, we would immediately return the cached value or an error. But, if the cache gets hammered with multiple queries when it starts up, the first query tries to refresh the cache, but the subsequent end up returning the cached result, which doesn't exist! (cache is starting up).

The fix implemented is to first verify that the cache is actually valid or not. If it isn't, then we wait for the previous refresh's output as well.

Related Issue(s)

• Fixes Bug Report: resilientQuery sometimes doesn't return the correct results while initialisation #13079

Checklist

• "Backport to:" labels have been added if this change should be back-ported
• Tests were added or are not required
• Did the new or modified tests pass consistently locally and on the CI
• Documentation was added or is not required

Deployment Notes

[vitess-bot]

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[vitess-bot]

I was unable to backport this Pull Request to the following branches: release-14.0.