raftstore: update applied_index_term after snapshot (#10476)

[ti-srebot]

cherry-pick #10476 to release-5.1
You can switch your code base to this Pull Request by using git-extras:

# In tikv repo:
git pr https://github.com/tikv/tikv/pull/10486

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git push [email protected]:ti-srebot/tikv.git pr/10486:release-5.1-e2713589cac4

---

What problem does this PR solve?

Issue Number: close #10225

Problem Summary:

After applying snapshot applied_term should also be updated, otherwise
it can produce snapshot with wrong term and cause panic in follower.

Check List

Tests

• Unit test
• Integration test

Release note

- fix follower meta corruption in rare cases with more than 4 replicas

[ti-srebot]

/run-all-tests

[ti-srebot]

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

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• NingLin-P
• gengliqi

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[zhouqiang-cl]

/merge

[ti-chi-bot]

@zhouqiang-cl: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

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[ti-chi-bot]

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

Commit hash: 6292cc3

[ti-chi-bot]

@ti-srebot: Your PR was out of date, I have automatically updated it for you.

At the same time I will also trigger all tests for you:

/run-all-tests

If the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.