feat(sink): support clickhouse sink checkpoint decouple

[xxhZs]

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What's changed and what's your intention?

Some users have fed back that they would like ck to be written to less frequently, and also that ck doesn't seem to be able to take advantage of asynchrony because it needs to be flushed at the barrier, so here it is changed to decouple

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[wenym1]

We should check the commit_checkpoint_interval is non_zero in sink validation. Otherwise, CN will panic when user specify 0 value.

[wenym1]

LGTM