brie/: add GetVersion function for tidbGlueSession (#22731)

[ti-srebot]

cherry-pick #22731 to release-5.0-rc
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/23142

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

git push [email protected]:ti-srebot/tidb.git pr/23142:release-5.0-rc-339bc46f873e

---

What problem does this PR solve?

Issue Number: pingcap/br#698

Problem Summary: BR will add backup tool version in backup meta. We need a GetVersion method to distinguish TiDB and BR.

What is changed and how it works?

What's Changed: Add GetVersion method

Related changes

• Need to cherry-pick to the release branch

Check List

Tests

• Unit test
• Integration test

Release note

• No release note

[ti-srebot]

/run-all-tests

[ti-srebot]

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

[kennytm]

/lgtm

[overvenus]

/lgtm

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• kennytm
• overvenus

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[overvenus]

/merge

[ti-chi-bot]

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

Commit hash: 606d76a

[ti-chi-bot]

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