Tests: Split some RunCMake.XcodeProject cases into a separate test

The `RunCMake.XcodeProject` has many cases and occasionally fails
due to timeout.  Move iOS and other device-specific cases to a new
`RunCMake.XcodeProject-Device` test.

Tests/RunCMake/XcodeProject-Device/main.cpp

@@ -0,0 +1,4 @@
+int main()
+{
+  return 0;
+}