[clang] [Clang] Remove the special-casing for RequiresExprBodyDecl in BuildResolvedCallExpr() after fd87d765c0 (PR #111277)

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cor3ntin wrote:

> That's #85198. Which was merged prior to the generic solution [fd87d76](https://github.com/llvm/llvm-project/commit/fd87d765c0455265aea4595a3741a96b4c078fbc) by @sdkrystian

Thanks!
Can you make the description reflect that more clearly? Thanks!

https://github.com/llvm/llvm-project/pull/111277