Install Powershell Core 7.4.5 in windows pwsh pipeline

.github/workflows/windows_tests.yaml

@@ -66,8 +66,9 @@ jobs:
       TCL_INSTALLER: SetupTcl-8.6.13-x64_Bawt-2.3.1
       TCL_DL_URL: http://www.bawt.tcl3d.org/download/Tcl-Pure
       TCLSH_DIR: C:\Tcl\bin
+      PWSH_INSTALLER: PowerShell-7.4.5-win-x64.msi
+      PWSH_DL_URL: https://github.com/PowerShell/PowerShell/releases/download/v7.4.5
       DIST_WIN: modules-*-win
-      MODULE_DIR: C:\Program Files\Environment Modules\bin
     steps:
       - name: Configure Git autocrlf
         shell: bash
@@ -86,6 +87,11 @@ jobs:
         run: |
           curl -LfsS -o %TCL_INSTALLER%.exe %TCL_DL_URL%/%TCL_INSTALLER%.exe
           %TCL_INSTALLER% /verysilent
+      - name: Install Powershell Core under Windows
+        shell: cmd
+        run: |
+          curl -LfsS -o %PWSH_INSTALLER% %PWSH_DL_URL%/%PWSH_INSTALLER%
+          msiexec.exe /package %PWSH_INSTALLER% /quiet ADD_PATH=1
       - name: Configure Git safe.directory
         run: |
           bash -lc 'git config --global --add safe.directory $(cygpath -u "$GITHUB_WORKSPACE")'
@@ -103,7 +109,7 @@ jobs:
         run: |
           :: manually define module cmd dir as PATH updated by INSTALL.bat
           :: is not inherited by test_script
-          if not "%TCLSH_DIR%" == "" path %MODULE_DIR%;%TCLSH_DIR%;%PATH%
+          if not "%TCLSH_DIR%" == "" path %TCLSH_DIR%;%PATH%
           cd %DIST_WIN%
           pwsh TESTINSTALL_PWSH.ps1
       - name: Uninstall Modules