Rename Volumes.which to avoid incompatible override

Library/Homebrew/extend/os/mac/diagnostic.rb

@@ -10,11 +10,8 @@ module OS
           @volumes = T.let(get_mounts, T::Array[String])
         end
 
-        # This is a pre-existing violation that should be refactored
-        # rubocop:todo Sorbet/AllowIncompatibleOverride
-        sig { override(allow_incompatible: true).params(path: T.nilable(Pathname)).returns(Integer) }
-        # rubocop:enable Sorbet/AllowIncompatibleOverride
-        def which(path)
+        sig { params(path: T.nilable(Pathname)).returns(Integer) }
+        def index_of(path)
           vols = get_mounts path
 
           # no volume found
@@ -429,13 +426,13 @@ module OS
 
           # Find the volumes for the TMP folder & HOMEBREW_CELLAR
           real_cellar = HOMEBREW_CELLAR.realpath
-          where_cellar = volumes.which real_cellar
+          where_cellar = volumes.index_of real_cellar
 
           begin
             tmp = Pathname.new(Dir.mktmpdir("doctor", HOMEBREW_TEMP))
             begin
               real_tmp = tmp.realpath.parent
-              where_tmp = volumes.which real_tmp
+              where_tmp = volumes.index_of real_tmp
             ensure
               Dir.delete tmp.to_s
             end

Library/Homebrew/utils.rb

@@ -40,7 +40,11 @@ module Homebrew
       yield if block_given?
       args.map!(&:to_s)
       begin
+        if argv0
           exec(cmd, argv0, *args, **options)
+        else
+          exec(cmd, *args, **options)
+        end
       rescue
         nil
       end