Revert "Use NuGet for vcpkg cache"

This reverts commit d628760339.

.github/workflows/ResInsightWithCache.yml

@@ -66,10 +66,7 @@ jobs:
       BUILD_TYPE: Release
       BUILDCACHE_DIR: ${{ github.workspace }}/buildcache_dir
       BUILDCACHE_ACCURACY: SLOPPY
-      USERNAME: magnesj
-      VCPKG_EXE: ${{ github.workspace }}/ThirdParty/vcpkg/vcpkg${{ matrix.config.os == 'windows-2022' && '.exe' || '' }}
-      FEED_URL: https://nuget.pkg.github.com/ceetronsolutions/index.json
-      VCPKG_BINARY_SOURCES: "clear;nuget,https://nuget.pkg.github.com/ceetronsolutions/index.json,readwrite"
+      VCPKG_BINARY_SOURCES: "clear;x-gha,readwrite"
 
     steps:
       - name: Checkout
@@ -158,7 +155,6 @@ jobs:
         run: |
           sudo apt-get update --option="APT::Acquire::Retries=3"
           sudo apt-get install --option="APT::Acquire::Retries=3" libxkbcommon-x11-0 libgl1-mesa-dev mesa-common-dev libglfw3-dev libglu1-mesa-dev libhdf5-dev
-          sudo apt install mono-complete
 
       - name: Install clang-19
         if: contains( matrix.config.cc, 'clang')
@@ -181,38 +177,17 @@ jobs:
         run: |
           ThirdParty/vcpkg/${{ matrix.config.vcpkg-bootstrap }}
 
-      - name: Configure NuGet for binary caching (Linux)
-        if: runner.os == 'Linux'
-        run: |
-          mono `${{ env.VCPKG_EXE }} fetch nuget | tail -n 1` \
-            sources add \
-            -Source "${{ env.FEED_URL }}" \
-            -StorePasswordInClearText \
-            -Name GitHubPackages \
-            -UserName "${{ env.USERNAME }}" \
-            -Password "${{ secrets.GH_PACKAGES_TOKEN }}"
-          mono `${{ env.VCPKG_EXE }} fetch nuget | tail -n 1` \
-            setapikey "${{ secrets.GH_PACKAGES_TOKEN }}" \
-            -Source "${{ env.FEED_URL }}"
-        
-      - name: Configure NuGet for binary caching (Windows)
-        if: runner.os == 'Windows'
-        shell: pwsh
-        run: |
-          .$(${{ env.VCPKG_EXE }} fetch nuget) `
-            sources add `
-            -Source "${{ env.FEED_URL }}" `
-            -StorePasswordInClearText `
-            -Name GitHubPackages `
-            -UserName "${{ env.USERNAME }}" `
-            -Password "${{ secrets.GH_PACKAGES_TOKEN }}"
-          .$(${{ env.VCPKG_EXE }} fetch nuget) `
-            setapikey "${{ secrets.GH_PACKAGES_TOKEN }}" `
-            -Source "${{ env.FEED_URL }}"
-
+      - name: Restore vcpkg cache
+        id: vcpkg-cache
+        uses: TAServers/vcpkg-cache@v3
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          
       - name: Configure
         shell: bash
         env:
+          VCPKG_FEATURE_FLAGS: "binarycaching" # Possibly redundant, but explicitly sets the binary caching feature flag
+          VCPKG_BINARY_SOURCES: "clear;files,${{ steps.vcpkg-cache.outputs.path }},readwrite"
           CC: ${{ matrix.config.cc }}
           CXX: ${{ matrix.config.cxx }}
         run: >