Exclude other RMW from Github CI build

Since ros2#145, the CI build of rmw_cyclonedds_cpp has been failing on Windows due to inadvertently injecting fastrtps into the build process.
fastrtps fails to build (eProsima/Fast-DDS#1173) causing the CI to fail.
There doesn't seem to be a better way to suppress this in action-ros-ci ros-tooling/action-ros-ci#177

Fixes ros2#164

.github/resources/suppress_other_rmw.repos

@@ -0,0 +1,11 @@
+definitions:
+  - &empty_repo
+    type: zip
+    url: data:application/zip;base64,UEsFBgAAAAAAAAAAAAAAAAAAAAAAAA==
+
+repositories:
+  ros2/rosidl_typesupport_connext/COLCON_IGNORE: *empty_repo
+  ros2/rmw_connext/COLCON_IGNORE: *empty_repo
+
+  ros2/rosidl_typesupport_fastrtps/COLCON_IGNORE: *empty_repo
+  ros2/rmw_fastrtps/COLCON_IGNORE: *empty_repo

.github/workflows/CI.yml

@@ -13,9 +13,11 @@ jobs:
       # azure ubuntu repo can be flaky so add an alternate source
       run: sed -e 's/azure.archive.ubuntu.com/us.archive.ubuntu.com/g' -e t -e d /etc/apt/sources.list | sudo tee /etc/apt/sources.list.d/nonazure.list
     - name: Acquire ROS dependencies
-      uses: ros-tooling/[email protected].19
+      uses: ros-tooling/[email protected].20
     - name: Build and test ROS
-      uses: ros-tooling/[email protected].15
+      uses: ros-tooling/[email protected].16
       with:
         package-name: rmw_cyclonedds_cpp
-        vcs-repo-file-url: https://raw.githubusercontent.com/ros2/ros2/${{ matrix.rosdistro }}/ros2.repos
+        vcs-repo-file-url: >
+          https://raw.githubusercontent.com/ros2/ros2/${{ matrix.rosdistro }}/ros2.repos
+          https://raw.githubusercontent.com/${{github.repository}}/${{github.sha}}/.github/resources/suppress_other_rmw.repos