*: add explicit partition pruning to index joins (#32007) (#32093)

[ti-srebot]

cherry-pick #32093 to release-5.2
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# In tidb repo:
git pr https://github.com/pingcap/tidb/pull/32931

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---

What problem does this PR solve?

Issue Number: close #32007

Problem Summary:
Explicit partition selection SELECT ... FROM pt PARTITION(p) ... was not considered when buildTableReaderForIndexJoin().

What is changed and how it works?

Use the PartitionNames (if set) and do skip looking up contents in non-mentioned partitions.

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

Fixed explicit partition selection in subselects.

[ti-chi-bot]

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[ti-srebot]

/run-all-tests

[ti-srebot]

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

[VelocityLight]

This pull request is closed because it's related version has closed automatic cherry-picking.
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