Editor, Engine, CoreUObject etc will have their own separate utility headers for tests that rely on respective special modules.
Replace platform names in catch2 code.
LLT all tests run preflight: 621e3c91f1206ae3ea5b0a66
#preflight 621e3c8bf1206ae3ea5b0872
#rb Jerome.Delattre
[CL 19202751 by chris constantinescu in ue5-main branch]