Fix target conflict when generating the same msg files in several subprojects

2 jobs for TargetConflictFix in 9 minutes and 30 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Windows
passed #263299
Windows10
masterJobWindows

00:06:30

 
  Linux
passed #263300
BranchJobLinux

00:02:59

91.0%