Install ros_gz from binary package (iron, humble) (#228)

* Install ros_gz from package, not from source, remove sim.repos

* Removed additional apt-get lines from cherry-pick

---------

Co-authored-by: Aaron Marburg <amarburg@uw.edu>
(cherry picked from commit 0e297bc)

# Conflicts:
#	sim.repos

Author: amarburg

.docker/Dockerfile

@@ -130,6 +130,7 @@ RUN wget https://packages.osrfoundation.org/gazebo.gpg -O /usr/share/keyrings/pk
     && apt-get -q update \
     && apt-get -y --quiet --no-install-recommends install \
     gz-${GZ_VERSION} \
+    ros-${ROS_DISTRO}-ros-gz${GZ_VERSION} \
     python3-pexpect \
     python3-wxgtk4.0 \
     python3-future \
@@ -178,7 +179,6 @@ RUN [ "/bin/bash" , "-c" , " \
 WORKDIR $USER_WORKSPACE
 RUN sudo apt-get -q update \
     && sudo apt-get -q -y upgrade \
-    && vcs import src < src/blue/sim.repos \
     && rosdep update \
     && rosdep install -y --from-paths src --ignore-src --rosdistro ${ROS_DISTRO} --skip-keys="gz-transport12 gz-sim7 gz-math7 gz-msgs9 gz-plugin2" \
     && sudo apt-get autoremove -y \