fix(generate): remove /run tmpfs mount when testing read-write setup

This is the typical setup users will have from older time, so test that
rather than mixed setup with /run on tmpfs and /tmp not.

See WeblateOrg/docker#2579

test-generate

@@ -28,7 +28,7 @@ EOT
   done
 fi
 if [ "$3" = "read-write" ] ; then
-    sed -i -e '/- \/tmp/D' -e '/read_only: true/D' docker-compose.yml
+    sed -i -e '/- \/run/D' -e '/- \/tmp/D' -e '/read_only: true/D' docker-compose.yml
 else
     # Allow execution in tmp
     sed -i 's/- \/tmp/- \/tmp:exec/' docker-compose.yml