Revert "In TypeName::GetFullyQualifiedType, strip SubstTemplateTypeParmType."
Revert "In TypeName::GetFullyQualifiedType, strip SubstTemplateTypeParmType."

This reverts commit 5190ebeb2eb0ac527881ab1c91401b20f4e54b39.

It fails on roottest/root/meta/dictSelection:execAtlasTest2

karies/cling,root-mirror/cling,marsupial/cling,root-mirror/cling,karies/cling,karies/cling,root-mirror/cling,root-mirror/cling,marsupial/cling,marsupial/cling,marsupial/cling,root-mirror/cling,marsupial/cling,karies/cling,marsupial/cling,karies/cling,root-mirror/cling,karies/cling