[lldb] Use canonical QualTypes to determine SwiftOptionSet formatter eligibility

When we lookup a clang type from DWARF by name, we
use the first one we find. In this test we have two
entities with the name `ComparisonResult`, en enum
and a typedef to the enum. So if we happened to find
the typedef first, we would fail to apply the `OptionSet`
formatter to it because it explicitly wants a QualType
whose type-class is an enum.

This fixes `lang/swift/enum_objc/TestEnumObjC.py` when applying
using the new `FindTypes` `TypeQuery` APIs (see
#7885)

The fix simply gets the canonical type before we check
its type-class.

(cherry picked from commit f7364b56732abeddb35082ba6002f75f26d795d0)

Author: Michael137

lldb/source/Plugins/Language/Swift/SwiftOptionSet.cpp

@@ -50,8 +50,8 @@ GetAsEnumDecl(CompilerType swift_type) {
   if (!clang_ts)
     return {nullptr, nullptr};
 
-  auto qual_type =
-      clang::QualType::getFromOpaquePtr(clang_type.GetOpaqueQualType());
+  auto qual_type = clang::QualType::getFromOpaquePtr(
+      clang_type.GetCanonicalType().GetOpaqueQualType());
   if (qual_type->getTypeClass() != clang::Type::TypeClass::Enum)
     return {nullptr, nullptr};