planner: restrict plan cache for decimal parameter types (#31769)

[ti-srebot]

cherry-pick #31769 to release-5.4
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# In tidb repo:
git pr https://github.com/pingcap/tidb/pull/33543

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---

What problem does this PR solve?

Issue Number: close #31730
ref #29565

Problem Summary:
The results are different if decimal column exist some larger value

What is changed and how it works?

For the decimal type, we can only use the plan when both Flen and Decimal should be less equal than the cached one.

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

[ti-chi-bot]

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[ti-srebot]

/run-all-tests

[ti-srebot]

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

[ti-chi-bot]

@ti-srebot: PR needs rebase.

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