fix($log): don't parse error stacks manually outside of IE/Edge

IE/Edge display errors in such a way that it requires the user to click in
4 places to see the stack trace. There is no way to feature-detect it so
there's a chance of the user agent sniffing to go wrong but since it's only
about logging, this shouldn't break apps. Other browsers display errors in
a sensible way and some of them map stack traces along source maps if available
so it makes sense to let browsers display it as they want.

Fixes #15590
Closes #15767