expression, types: use time.Add() to calculate subtime (#32903)

[ti-srebot]

cherry-pick #32903 to release-5.0
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# In tidb repo:
git pr https://github.com/pingcap/tidb/pull/33125

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---

What problem does this PR solve?

Issue Number: close #31868

Problem Summary:
The time.sub() will cause overflow when the gap with duration greatter than 290 years, so use time.add() instead of it. Open a new issue to trace improve time type #32937

What is changed and how it works?

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

fix builtin func `subtime` get a wrong result

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[ti-chi-bot]

@ti-srebot: This cherry pick PR is for a release branch and has not yet been approved by release team.
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[ti-srebot]

/run-all-tests

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