Msys2 Makefile.meson: ruledit installer
Add ruledit installer build to Msys2 Makefile.meson. Only for ucrt64 target (as Qt6 requires win10 anyway)
Depends on #46141
Add ruledit installer build to Msys2 Makefile.meson. Only for ucrt64 target (as Qt6 requires win10 anyway)