split databend-query to multiple crates

[PsiACE]

Summary

Now Databend-Query is a rather large crate and we had to waste a lot of time on compiling and linking.

It's time to split it up into a few relatively small crates.

Related #4399

[Xuanwo]

It's very important to do this job in a progressive way. Otherwise, we can't finish it.

[Xuanwo]

#4399 is a good example: It starts three months ago and ends with numerous code conflicts...

[PsiACE]

It's very important to do this job in a progressive way. Otherwise, we can't finish it.

Yes, we're having trouble finding a window to do it all at once, and I think it will probably be done in two or three rounds.

[FANNG1]

code one minute, cargo check ten minutes :(

[PsiACE]

Although there is more that could be split, I thought we'd stop and wait for the new planner to be officially launched (#6644) so that we could get rid of the old useless code and determine how to refactor this further.

After #6665, my local build/check speed got a boost and returned to at least usable levels.

[Xuanwo]

Implemented.