[clang] [Clang][AST] Let DeclPrinter print trailing requires expressions for template parameters (PR #96864)

[Haojian Wu via cfe-commits]

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@@ -1189,6 +1189,16 @@ void DeclPrinter::printTemplateParameters(const TemplateParameterList *Params,
   Out << '>';
   if (!OmitTemplateKW)
     Out << ' ';
+
+  if (const Expr *RequiresClause = Params->getRequiresClause()) {
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hokein wrote:

If I read the code correctly, looks like we can move this code to Line 1190 (just immediately before the  above `if (!OmitTemplateKW)`)? Then we can get rid of all the `OmitTemplateKw` logic inside this if branch.

https://github.com/llvm/llvm-project/pull/96864