fix(sqlsmith): ban tables with invalid columns for window functions

[kwannoel]

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What's changed and what's your intention?

Related: #10516

This PR bans relations like CREATE table t (v1 timestamp, window_start timestamp) from being used when generating hop and tumble functions.

Done by filtering out any tables with window_start / window_end when selecting candidate relations for hop and tumble.

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Merging #10913 (193131a) into main (dc6f647) will increase coverage by 0.00%.
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+ Hits       156237   156241    +4     
+ Misses      67055    67051    -4     

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[stdrc]

LGTM

[kwannoel]

May still need a further fix after this PR, which is to make sure gen hop and gen tumble add window_start and window_end to their columns.

EDIT: actually not so straightforward. There could be hidden columns as a result of group_by. Those may not be SELECTed, but can still cause HOP to fail. Because they are still a part of the input.
We may not be able to prune them, sometimes they are a required part of the stream key, esp for group by.