Merge: from profiling_improvements
- New server profiler allocation tracking mode, start with "watchallocs", stop with "stopwatchingallocs", control export via various NotifyOn... server vars
- Json Snapshot compression is now streamed, saving 95% of memory in the process and reducing GC events
Tests: unit tests in editor, all forms of profiling in editor on Craggy in Server+Client mode, all forms of profiling in standalone server on Linux WSL