Update Windows profile build workflow to download and unpack artifact, setup MozillaBuild, and clone Waterfox repository

.github/workflows/windows-profile-build.yml

@@ -17,7 +17,6 @@ jobs:
 
     steps:
 
-
       - name: Clone
         uses: actions/checkout@v4
         with:
@@ -29,7 +28,7 @@ jobs:
 
           rm .mozconfig
           python --version
-          $env:MOZCONFIG=$HOME/.mozconfig
+          $env:MOZCONFIG=$HOME + '/.mozconfig'
           ./mach bootstrap --application-choice browser
           $env:LLVM_PROFDATA = $HOME + '/.mozbuild/clang/bin/llvm-profdata.exe'; $env:JARLOG_FILE = 'en-US.log'; python mach python build/pgo/profileserver.py --binary c:/artifact/zen/zen.exe