bench wrappers for php, ruby, zig, dart, elixir and perl are not keyword-only #9766

wrapper_signatures.sh fails for php_bench, ruby_bench, zig_bench, dart_bench, elixir_bench and perl_bench (found while working on #9763). The other wrappers take (name, *, ...).

Done when: every <lang>_bench passes the wrapper signature test.

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https://claude.ai/code/session_01Xut2hwESun1HL2eSVd1d5B