[clang] [Clang][Sema] Use the correct injected template arguments for partial specializations when collecting multi-level template argument lists (PR #112381)

[Younan Zhang via cfe-commits]

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@@ -2085,7 +2085,9 @@ class ClassTemplateSpecializationDecl : public CXXRecordDecl,
 class ClassTemplatePartialSpecializationDecl
   : public ClassTemplateSpecializationDecl {
   /// The list of template parameters
-  TemplateParameterList* TemplateParams = nullptr;
+  TemplateParameterList *TemplateParams = nullptr;
+
+  TemplateArgument *InjectedArgs = nullptr;
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zyn0217 wrote:

Do we need serialization?

https://github.com/llvm/llvm-project/pull/112381