[lldb] Deduplicate copy-pasted TypeSystemMap::GetTypeSystemForLanguage
There are two implementations for `TypeSystemMap::GetTypeSystemForLanguage`
which are both identical beside one taking a `Module` and one taking a `Target`
(and then passing that argument to the `TypeSystem::CreateInstance` function).
This merges both implementations into one function with a lambda that wraps the
different calls to `TypeSystem::CreateInstance`.
Reviewed By: #lldb, JDevlieghere
Differential Revision: https://reviews.llvm.org/D82537