[llvm] [lldb][windows] build lldb and lldb-dap in PR testing (PR #195884)

[Aiden Grossman via llvm-commits]

boomanaiden154 wrote:

> What would be the best way to do this? Should we merge it, open a dummy PR against lldb, measure the changes and revert?

We don't need to merge anything to measure.

Numbers from building locally with sccache/without sccache would probably suffice.

Otherwise you can just hack at the scripts in a dummy PR to get the right numbers.

https://github.com/llvm/llvm-project/pull/195884