Also capture SFINAE error counts (ROOT-10754):
Also capture SFINAE error counts (ROOT-10754):

When doing lookup on templates, instantiation can fail.
This can be triggered during templarte instantiation somewhere
in clang, autoloading, cling-lookup - and SFINAE errors that
occurr in cling-lookup must not bubble up to clang, or else
clang will think that there was a problem (where there was
none - just e.g. ROOT trying to autoload a bogus template).

In this concrete case, a template specialized with a lambda
was not found by clang, was tried to be autoloaded, TMetaUtils
produced a broken normalized type name, lookup on the broken
type name failed with a SFINAE error - and that ended up being
swallowed by a clang SFINAETrap by the topmost lookup.

Instead, keep SFINAE errors to ourselves.

olifre/root,karies/root,olifre/root,olifre/root,root-mirror/root,root-mirror/root,karies/root,karies/root,karies/root,karies/root,root-mirror/root,olifre/root,root-mirror/root,olifre/root,root-mirror/root,root-mirror/root,olifre/root,karies/root,olifre/root,root-mirror/root,karies/root,olifre/root,root-mirror/root,karies/root,karies/root,olifre/root,olifre/root,karies/root,root-mirror/root,karies/root,root-mirror/root,olifre/root,root-mirror/root