[0.4.14][MSCONFIG_NEW] Exclude from the iso, for the time being CORE-18067

[0.4.14][MSCONFIG_NEW] Exclude from the iso, for the time being CORE-18067

Since more than 10 years we do ship two binaries for the very same purpose in our isos:
msconfig and msconfig_new.

msconfig_new was an attempt to refactor the old tool, but it got stuck rather soon
and is bloating our isos since then, and consuming build-time.
My testing shows that the older version is superior in many ways
compared to that refactoring attempt: see CORE-18067 for examples of some bugs.

Personally I think focusing on the older tool exclusively would make more sense
than trying to improve that refactoring proposal.
But since one never knows what the future might bring and I did not want to step on anyones toes,
I decided to just disable the build and iso-integration of the unfinished one meanwhile,
instead of dumping it entirely. Although my feeling is that after 10years of waiting
it's not worth waiting another 10 years with that.

Fix picked from:
0.4.15-dev-3882-g e6de6098fb1ec1798f6c94150ea092dd3030a0a2