tests: test with buildx experimental

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

.github/workflows/build.yml

@@ -73,11 +73,14 @@ jobs:
           - remote
         pkg:
           - ./tests
+        experimental:
+          - ""
+          - 1
     steps:
       -
         name: Prepare
         run: |
-          echo "TESTREPORTS_NAME=${{ github.job }}-$(echo "${{ matrix.pkg }}-${{ matrix.worker }}" | tr -dc '[:alnum:]-\n\r' | tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV
+          echo "TESTREPORTS_NAME=${{ github.job }}-$(echo "${{ matrix.pkg }}-${{ matrix.worker }}-${{ matrix.experimental }}" | tr -dc '[:alnum:]-\n\r' | tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV
       -
         name: Checkout
         uses: actions/checkout@v4
@@ -107,6 +110,7 @@ jobs:
           ./hack/test
         env:
           TEST_REPORT_SUFFIX: "-${{ env.TESTREPORTS_NAME }}"
+          TEST_BUILDX_EXPERIMENTAL: ${{ matrix.experimental }}
           TEST_DOCKERD: "${{ startsWith(matrix.worker, 'docker') && '1' || '0' }}"
           TESTFLAGS: "${{ (matrix.worker == 'docker' || matrix.worker == 'docker\\+containerd') && env.TESTFLAGS_DOCKER || env.TESTFLAGS }} --run=//worker=${{ matrix.worker }}$"
           TESTPKGS: "${{ matrix.pkg }}"