session: fix tables_priv table schema (#33599)

[ti-srebot]

cherry-pick #33599 to release-6.0
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/33606

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

git push [email protected]:ti-srebot/tidb.git pr/33606:release-6.0-e15e6d035872

---

What problem does this PR solve?

Issue Number: close #33588

Problem Summary:

#28546 modify tables_priv and columns_priv tables' column(Column_priv) type. But it doesn't update tables_priv column in upgrade step.

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
  deploy a v5.2 cluster
  upgrade to this PR.
  execute SQL

use test;
create table t(a int);
create user u1;
grant all on test.t to u1;

• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

 Fix the issue that privilege-related operations may fail for upgraded clusters.

[ti-chi-bot]

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[ti-srebot]

/run-all-tests

[ti-srebot]

@zimulala you're already a collaborator in bot's repo.

[zimulala]

Duplicated with #33600.