[clang] [llvm] [cmake][llvm] Limit the number of Xcode schemes created by default (PR #101243)

[Jonas Devlieghere via cfe-commits]

JDevlieghere wrote:

Nice. An added benefit of doing it this way is that you can always set the property for a particular target if you really need the scheme and you can do it in the same cmake file that creates the target (i.e. in a subproject). 

https://github.com/llvm/llvm-project/pull/101243