C# and Go runtime tests fixes on non-Windows OS#3386

Merged

parrt merged 3 commits intoantlr:masterfrom

KvanTTT:csharp-go-runtime-tests-fixes

Dec 6, 2021

Commits on Nov 29, 2021

C# runtime tests: fix running on non-Windows OS
KvanTTT
committed

Commits on Dec 3, 2021

Go runtime tests: fix running on non-Windows OS
KvanTTT
committed
Mark initializeRuntime methods with synchronized to make them multi-thread safe
KvanTTT
committed