fix: Multi-thread recreate view/table gives error

[zhyass]

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Summary

When executing DROP TABLE IF EXISTS, if the table metadata contains a drop_on flag, indicating that the table has already been marked for deletion, no error will be returned. This ensures the operation is idempotent, preventing unnecessary errors from being raised if the table has already been dropped.

• fixes: bug: Multi-thread recreate view gives error #16188

Tests

• Unit Test
• Logic Test
• Benchmark Test
• No Test - Explain why

Type of change

• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Breaking Change (fix or feature that could cause existing functionality not to work as expected)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):

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This change is 

[drmingdrmer]

Reviewed 4 of 4 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @dantengsky and @sundy-li)

[drmingdrmer]

Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @dantengsky and @sundy-li)

[drmingdrmer]

Nice shot!