search.followSymlinks is hooked up for searches using QueryBuilder (find in files, quickopen) but not searches initiated by extensions, or from workspaceContains. Maybe it should be.

Pro: A nice lever for people to have when they are having trouble with symlinks e.g. from cnpm/pnpm. Also, if the user has indicated that they have a setup where it doesn't make sense for their searches to follow symlinks, then the same should apply for other searches.

Con: User settings should not impact extensions in this case

cc @chrmarti I said I would file this last week