backend/local: fix panic while lightning quits (#33738)

[lichunzhu]

cherry-pick #33738 to release-5.4
You can switch your code base to this Pull Request by using git-extras:

# In tidb repo:
git pr https://github.com/pingcap/tidb/pull/33802

After apply modifications, you can push your change to this PR via:

git push [email protected]:ti-srebot/tidb.git pr/33802:release-6.0-15a01fa50a7c

---

What problem does this PR solve?

Issue Number: close #33524

Problem Summary: as the issue

What is changed and how it works?

1. fix the panic log while lightning quits. It's caused by Close pebble before ingestSST for loop quits by check db before ingest.
2. add recover for places that are likely to panic.

Check List

Tests

• Unit test
• Integration test

Side effects

None

Documentation

None

Release note

None

[ti-chi-bot]

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[ti-chi-bot]

@lichunzhu: This cherry pick PR is for a release branch and has not yet been approved by release team.
Adding the do-not-merge/cherry-pick-not-approved label.

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[sre-bot]

Code Coverage Details: https://codecov.io/github/pingcap/tidb/commit/265e49c64246aa161d687d5cc14e6718b574849d

[codecov]

Codecov Report

Attention: Patch coverage is 30.76923% with 9 lines in your changes missing coverage. Please review.

Please upload report for BASE (release-5.4@b1c5a67). Learn more about missing BASE report.

Additional details and impacted files

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##             release-5.4     #33804   +/-   ##
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