What problem does this PR solve?

features:

• support drop column for alert table
  • alter table t1 drop column if exists v1
• support unique_index for add column

fmt

• ColumnCatalog::add_index_meta

Code changes

• Has Rust code change
• Has CI related scripts change

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

Note for reviewer