Our deprecated out-of-tree build option has been removed which means that we now need to host our rosdoc2 sources in a read-write location to allow build artifacts to be generated in-tree.
Mounting read-write shouldn't matter overmuch because we delete and re-clone rosdoc2 each time the job runs1.
This is an alternative to #1030 that is slightly lower touch.
Our deprecated out-of-tree build option has been removed which means that we now need to host our rosdoc2 sources in a read-write location to allow build artifacts to be generated in-tree.
Mounting read-write shouldn't matter overmuch because we delete and re-clone rosdoc2 each time the job runs1.
This is an alternative to #1030 that is slightly lower touch.