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

[Younan Zhang via cfe-commits]

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+// RUN: %clang_cc1 -std=c++20 -ast-dump -ast-dump-filter=pr126341 %s | FileCheck %s
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zyn0217 wrote:

Can you consolidate the test into a pre-existing file e.g. `AST/ast-dump-templates.cpp`?

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