fix(ssa_fuzzer): fix panic if compiler removed return value#9216

TomAFrench merged 2 commits intomasternoir-lang/noir:masterfrom

sn/fix_ssa_fuzzer_if_number_of_return_values_is_zeronoir-lang/noir:sn/fix_ssa_fuzzer_if_number_of_return_values_is_zeroCopy head branch name to clipboard