[clang-tools-extra] [WIP][clang-tidy] Ignore `if consteval` in else-after-return (PR #91588)

[Julian Schmidt via cfe-commits]

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@@ -0,0 +1,17 @@
+// RUN: %check_clang_tidy -std=c++20 %s readability-else-after-return %t 
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5chmidti wrote:

While `consteval` was added in C++20, `if consteval` is a C++23 feature. Please use `-std=c++23`
https://en.cppreference.com/w/cpp/language/if#Consteval_if

https://github.com/llvm/llvm-project/pull/91588