[Windows] Embedded python is not used by lldb/REPL

[chawyehsu]

It seems the embedded python is not added to PATH (don't know if it's intentional, I assume a no so open the issue here) during installation and REPL/lldb reports python dll not found error despite the fact that embedded python has been selected and be installed.

Desktop ~
$ where.exe swift
C:\Users\[redacted]\AppData\Local\Programs\Swift\Toolchains\0.0.0+Asserts\usr\bin\swift.exe
Desktop ~
$ swift repl
warning: There is an architecture mismatch between the installed toolchain and the resolved Python's architecture:
Toolchain: x64
Python: unknown
error: unable to find 'python310.dll'.
Welcome to Swift version 6.3-dev (LLVM 35f48306184cd25, Swift a69dbb3366e64d8).
Type :help for assistance.
1>
Desktop ~
$ ls C:\Users\[redacted]\AppData\Local\Programs\Swift\
Platforms/  Python-3.10.1/  Redistributables/  Runtimes/  Toolchains/
Desktop ~
$ ls C:\Users\[redacted]\AppData\Local\Programs\Swift\Python-3.10.1\python310.dll
'C:\Users\[redacted]\AppData\Local\Programs\Swift\Python-3.10.1\python310.dll'*