feat(frontend): support extended query for cursor

[xxhZs]

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What's changed and what's your intention?

Previously, we didn't support fetch cursor with extendend mode, this pr supports it

We've done some refactoring of the subscription cursor

1. When the cursor is created, we use a table to specify a shcema , and then when we fetch, if the shcema result is different from old, we update the shcema and return null to avoid inconsistencies between the schema and the row.
2. When the cursor is created, we create the row_stream with the default formats, but we don't consume it, we only refill and consume it when fetch inputs the correct formats

#17716

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Release note

Can delete unsupported extendend query mode