[clang] [NFC][analyzer][test][z3] Move test cases requiring Z3 to the `Analysis/z3/` subdirectory (PR #183724)

[Balázs Benics via cfe-commits]

steakhal wrote:

> @steakhal, I resigned from that list last year. Maybe I should apply for it again.

I'm looking for you coming back one day :)
I'll merge this then.

https://github.com/llvm/llvm-project/pull/183724