[wip] ddl: Implement TableMode feature

[fishiu]

What problem does this PR solve?

Issue Number: close #59008

Problem Summary:

What changed and how does it work?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.

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.

None

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[D3Hunter]

this DDL can always use V2

[fishiu]

Can I still keep getArgsV1 and decodeV1? I found that there will be syntax error if these 2 func are removed, seems that AlterTableModeArgs must implement these 2 functions.

[D3Hunter]

use v2 directly for new DDL

[fishiu]

already changed to model.JobVersion2