[clang] [clang] [ASTDump] Add support for structural value template arguments in TextNodeDumper (PR #126341)

[via cfe-commits]

sakria9 wrote:

@zyn0217 Hi, I have added a test and modfied the release note. Please take a look.

Test log:

```
$ ./bin/llvm-lit ../clang/test/AST/ast-dump-template-argument-structural-value.cpp 
llvm-lit: /workspaces/clice/deps/llvm/llvm/utils/lit/lit/llvm/config.py:506: note: using clang: /workspaces/clice/deps/llvm/build-debug/bin/clang
-- Testing: 1 tests, 1 workers --
PASS: Clang :: AST/ast-dump-template-argument-structural-value.cpp (1 of 1)

Testing Time: 0.22s

Total Discovered Tests: 1
  Passed: 1 (100.00%)
```

https://github.com/llvm/llvm-project/pull/126341