expression: implement castTimeAsDuration function pushdown

[AntiTopQuark]

What problem does this PR solve?

Issue Number: close #37033
related issue: pingcap/tiflash#5306
Problem Summary:
support castTimeAsDuration in tiflash

What is changed and how it works?

1. open pushdown of castTimeAsDuration
2. add some test

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.

Support to pushdown castTimeAsDuration to TiFlash

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