Run `tap --repair` as part of `prune`

And by extension, `cleanup`.

Fixes Homebrew/homebrew#18658.

Library/Homebrew/cmd/prune.rb

 require 'keg'
+require 'cmd/tap'
 
 module Homebrew extend self
   # $n and $d are used by the ObserverPathnameExtension to keep track of
@@ -28,6 +29,8 @@ module Homebrew extend self
 
     dirs.sort.reverse_each{ |d| d.rmdir_if_possible }
 
+    repair_taps
+
     if $n == 0 and $d == 0
       puts "Nothing pruned" if ARGV.verbose?
     else