[PATCH] D78762: build: use `find_package(Python3)` if available

[Saleem Abdulrasool via Phabricator via cfe-commits]

compnerd added a comment.

@JDevlieghere I think that for LLDB, which this patch does not touch, the proper thing to do is to have 2 different paths with the ability to explicitly opt into the path, i.e. `LLDB_USE_PYTHON2:BOOL` and `LLDB_USE_PYTHON3:BOOL` with `CMakeDependentOption` to prevent the two from being set to `TRUE` simultaneously.  If two paths need to be supported, then you must have two paths.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D78762/new/

https://reviews.llvm.org/D78762