ci: use sccache on windows

This apparently works with less hacks, and is actually suggested by the
action we're using

Signed-off-by: Seth Flynn <getchoo@tuta.io>

.github/actions/setup-dependencies/action.yml

@@ -53,9 +53,20 @@ runs:
       if: ${{ (runner.os != 'Windows' || inputs.msystem == '') && inputs.build-type == 'Debug' }}
       uses: hendrikmuhs/ccache-action@v1.2.17
       with:
+        variant: ${{ runner.os == 'Windows' && 'sccache' || 'ccache' }}
         create-symlink: ${{ runner.os != 'Windows' }}
         key: ${{ runner.os }}-qt${{ inputs.qt_ver }}-${{ inputs.architecture }}
 
+    - name: Use ccache on debug builds
+      if: ${{ inputs.build-type == 'Debug' }}
+      shell: bash
+      env:
+        # Only use sccache on MSVC
+        CCACHE_VARIANT: ${{ (runner.os == 'Windows' && inputs.msystem == '') && 'sccache' || 'ccache' }}
+      run: |
+        echo "CMAKE_C_COMPILER_LAUNCHER=$CCACHE_VARIANT" >> "$GITHUB_ENV"
+        echo "CMAKE_CXX_COMPILER_LAUNCHER=$CCACHE_VARIANT" >> "$GITHUB_ENV"
+
     - name: Install Qt
       if: ${{ inputs.msystem == '' }}
       uses: jurplel/install-qt-action@v4

.github/actions/setup-dependencies/windows/action.yml

@@ -48,24 +48,6 @@ runs:
           qt6-networkauth:p
           cmark:p
 
-    - name: Force newer ccache (MSVC)
-      if: ${{ inputs.msystem == '' && inputs.build-type == 'Debug' }}
-      shell: bash
-      run: |
-        choco install ccache --version 4.7.1
-
-    - name: Configure ccache (MSVC)
-      if: ${{ inputs.msystem == '' && inputs.build-type == 'Debug' }}
-      shell: pwsh
-      run: |
-        # https://github.com/ccache/ccache/wiki/MS-Visual-Studio (I coudn't figure out the compiler prefix)
-        Copy-Item C:/ProgramData/chocolatey/lib/ccache/tools/ccache-4.7.1-windows-x86_64/ccache.exe -Destination C:/ProgramData/chocolatey/lib/ccache/tools/ccache-4.7.1-windows-x86_64/cl.exe
-        echo "CLToolExe=cl.exe" >> $env:GITHUB_ENV
-        echo "CLToolPath=C:/ProgramData/chocolatey/lib/ccache/tools/ccache-4.7.1-windows-x86_64/" >> $env:GITHUB_ENV
-        echo "TrackFileAccess=false" >> $env:GITHUB_ENV
-        # Needed for ccache, but also speeds up compile
-        echo "UseMultiToolTask=true" >> $env:GITHUB_ENV
-
     - name: Retrieve ccache cache (MinGW)
       if: ${{ inputs.msystem != '' && inputs.build-type == 'Debug' }}
       uses: actions/cache@v4.2.3