[clang] [clang][ExtractAPI] improve template argument name deduction (PR #77716)

[Daniel Grumberg via cfe-commits]

================
@@ -196,8 +196,7 @@ template<typename Z> class Foo<Z, int> {};
           "spelling": "<"
         },
         {
-          "kind": "typeIdentifier",
-          "preciseIdentifier": "c:t0.0",
+          "kind": "genericArgument",
----------------
daniel-grumberg wrote:

might be best to leave these as generic text fragments

https://github.com/llvm/llvm-project/pull/77716