planner: refactor the code for plan cache

[Reminiscent]

What problem does this PR solve?

Issue Number: close #32371

Problem Summary:
Refactor the code for plan cache in the usage of binary protocol

What is changed and how it works?

1. Remove some useless code
2. Add more test cases

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

None

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[Reminiscent]

Related to #11970, #22381

[ti-chi-bot]

@Reminiscent: PR needs rebase.

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