BR: retry for PD request error and TiKV IO error

[joccau]

What problem does this PR solve?

Issue Number: close #27787

What is changed and how it works?

What's Changed:
(1)Add TiKV "timeout" storage error into retryable errors
(2)Add WithRetry whenGetAllTiKVStores() when request for PD

Tests

• Unit test
• Manual test (add detailed scripts or steps below)

Release note

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• Little-Wallace
• kennytm

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[joccau]

/component br

[joccau]

/sig migrate

[joccau]

/cc @3pointer @YuJuncen

[joccau]

/run-integration-tests

[joccau]

/run-all-tests

[Little-Wallace]

LGTM

[kennytm]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 7ad0d47

[ti-chi-bot]

@joccau: Your PR was out of date, I have automatically updated it for you.

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/run-all-tests

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