store/tikv: fix misuse of PD client's GetStore (#23695)

[ti-srebot]

cherry-pick #23695 to release-3.0
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/24499

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

git push git@github.com:ti-srebot/tidb.git pr/24499:release-3.0-addbd46c3dd1

---

Signed-off-by: longfangsong longfangsong@icloud.com

What problem does this PR solve?

Issue Number: close #23676

Problem Summary:

• TiDB wrongly uses the PD client's GetStore(), which may result in dead loops.
• store.State isn't changed if it becomes a tombstone

What is changed and how it works?

What's Changed:

Skip the early-return if branch when "load Store from PD success but pd didn't found the store"

How it Works:

By checking the error message. This is a quick and dirty solution. A better solution (which needs to change the pdClient, and maybe the whole way of our error handling process) needs more discussion.

Related changes

• Need to cherry-pick to the release branch
  Needs to cherry-pick to 5.0.

Check List

Tests

• Unit test
• Integration test

Release note

• No release note

[ti-chi-bot]

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[ti-srebot]

/run-all-tests

[ti-srebot]

@longfangsong please accept the invitation then you can push to the cherry-pick pull requests.
https://github.com/ti-srebot/tidb/invitations

[winoros]

Please fix the tests and then re-request the review. Thanks!

[hawkingrei]

close for DMR version