[llvm] [LLVM] Add support to define lit test suites with a smaller set of dependencies (PR #155929)

[Min-Yih Hsu via llvm-commits]

mshockwave wrote:

> I'm confused by the title, shouldn't it be instead "Add support to define lit test suites with an include/exclude list of folders" or something like this? I don't see the "dependency" part here.

I believe the `DEPENDS` fields of these newly-added `add_list_testsuites` are different from the original one -- they only depends on a (much) smaller set of tools.

https://github.com/llvm/llvm-project/pull/155929