feat(colcon-build): set the default pre-command to empty

colcon-build/action.yaml

@@ -29,13 +29,13 @@
   build-pre-command:
     description: Will be prepended to the colcon build command. e.g. "nice -n 19" or "taskset --cpu-list 0-2"
     required: false
-    default: nice -n 19
+    default: ""
   colcon-parallel-workers-flag:
     description: Will be appended to the colcon build command to limit number of packages built in parallel. e.g. "--parallel-workers 3"
     default: ""
     required: false
   makeflags:
     description: Will be exported as MAKEFLAGS environment variable. e.g. "-j 4"
     default: ""
     required: false
 
@@ -92,8 +92,8 @@
         cat /etc/nsswitch.conf
         sed -e 's#hosts:\(.*\)dns\(.*\)#hosts:\1\2#g' -i.bak /etc/nsswitch.conf
         cat /etc/nsswitch.conf
         MAKEFLAGS="${{ inputs.makeflags }}"
         echo "MAKEFLAGS=$MAKEFLAGS"  # for debugging
         ${{ inputs.build-pre-command }} colcon build ${{ inputs.colcon-parallel-workers-flag }} \
           --event-handlers console_cohesion+ \
           --packages-above-and-dependencies ${{ inputs.target-packages }} \