Merge pull request #18079 from Homebrew/cleaner-typed-strict

cleaner: use `typed: strict`

Library/Homebrew/cleaner.rb

@@ -1,4 +1,4 @@
-# typed: true # rubocop:todo Sorbet/StrictSigil
+# typed: strict
 # frozen_string_literal: true
 
 # Cleans a newly installed keg.
@@ -113,7 +113,7 @@ def executable_path?(path)
  # pointless conflicts with other formulae. They are removed by Debian,
  # Arch & MacPorts amongst other packagers as well. The files are
  # created as part of installing any Perl module.
- PERL_BASENAMES = Set.new(%w[perllocal.pod .packlist]).freeze
+ PERL_BASENAMES = T.let(Set.new(%w[perllocal.pod .packlist]).freeze, T::Set[String])
 
  # Clean a top-level (`bin`, `sbin`, `lib`) directory, recursively, by fixing file
  # permissions and removing .la files, unless the files (or parent