KWSys: Update to version as of 2021-11-01

Brad Kingrequested to merge
brad.king/cmake:update-kwsys into master

In particular, get utils/kwsys!236 (merged), utils/kwsys!238 (merged), utils/kwsys!239 (merged), and utils/kwsys!240 (merged). This allows find_program to see Windows app exec links.

Update CMake's find_program implementation to avoid finding the %USERPROFILE%\AppData\Local\Microsoft\WindowsApps\python.exe Windows app exec link that references AppInstallerPythonRedirector instead of a real python.

Fixes: #22743 (closed)

Edited by Brad King

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