br: restore privilege tables on full restore by default

[lance6716]

What problem does this PR solve?

Issue Number: close #35395

Problem Summary:

What is changed and how it works?

• restore full and restore point with full backup data which contains system tables(i.e. backup data since 5.1.0) can only run on a fresh and system-table-compatible cluster by default. if user want old behavior and only restore data, user can set filter explicitly.
• if the backup data doesn't contain system tables, we use old behavior, there's no fresh cluster check and only restores data.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• 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

Please refer to Release Notes Language Style Guide to write a quality release note.

restore privilege tables on full restore by default

[ti-chi-bot]

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[lance6716]

/cc @D3Hunter

[sre-bot]

Code Coverage Details: https://codecov.io/github/pingcap/tidb/commit/b35fa1ce0080b077fbfd25b3ce7fdaab871d4b5b