Pass the quoted script path to PowerShell using `-File`.
This ensures the path is treated as a string rather
than a command, and correctly handles file paths
that contain spaces, unblocking integration tests.
Add logging to autobuild.cmd for easier debugging.
Quote the paths to the CodeQL CLI dist or autobuild scripts when invoked.
This unblocks integration testing, since our integration tests always use
a CLI with a space in its directory name.
