s3(ticdc): do not report unretryable error when initializing s3 storage (#11312)

[ti-chi-bot]

This is an automated cherry-pick of #11312

What problem does this PR solve?

Issue Number: close #11311

What is changed and how it works?

do not report unretryable error when initializing s3 storage, because this kind of error is retryale, return ErrStorageInitialize if the external storage initialization fails.

Check List

Tests

• Manual test (add detailed scripts or steps below)

Questions

Will it cause performance regression or break compatibility?

Do you need to update user documentation, design documentation or monitoring documentation?

Release note

`None`.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Please upload report for BASE (release-8.1@20ee93f). Learn more about missing BASE report.

Additional details and impacted files

Components	Coverage Δ
cdc	61.9411% <0.0000%> (?)
dm	51.3194% <0.0000%> (?)
engine	63.4373% <0.0000%> (?)

Flag	Coverage Δ
unit	57.5778% <0.0000%> (?)

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##             release-8.1     #11319   +/-   ##
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[ti-chi-bot[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: sdojjy

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[3AceShowHand]

/retest

[3AceShowHand]

/retest