.github: move run-xserver-build-and-test.sh under ubuntu/ subdir

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>

.github/workflows/build-xserver.yml

@@ -51,14 +51,8 @@ jobs:
                 key: ${{ runner.name }}-x11-deps-${{ hashFiles('.github/scripts/install-prereq.sh') }}
                 restore-keys: ${{ runner.name }}-x11-deps-
 
-            - name: generic prereq
-              run:  .github/scripts/install-prereq.sh
-
             - name: build and test
-              run:  .github/scripts/run-xserver-build-and-test.sh
-              env:
-                  XTEST_DIR:  ${{ env.X11_BUILD_DIR }}/xts
-                  PIGLIT_DIR: ${{ env.X11_BUILD_DIR }}/piglit
+              run:  .github/scripts/ubuntu/run-xserver-build-and-test.sh
 
             - name: archive build logs
               uses: actions/upload-artifact@v4
@@ -68,11 +62,6 @@ jobs:
                       __BUILD/meson-logs/*
                       __BUILD/test/piglit-results/*
 
-            - name: ddx build check
-              run:  .github/scripts/check-ddx-build.sh
-            - name: manpage check
-              run:  .github/scripts/manpages-check
-
     drivers-build-ubuntu:
         env:
             MESON_ARGS: -Dprefix=/usr -Dxorg-sdk=true -Dxorg=false -Dxephyr=false -Dwerror=false -Dxcsecurity=false -Dxorg=true -Dxvfb=false -Dxnest=false -Dxfbdev=false