FIX: FinalDestination::HTTP: validate address argument (#25407)

This would only be empty due to a programming error elsewhere, but
checking this here is a failstop so that it doesn't go further.

lib/final_destination/http.rb

@@ -2,6 +2,8 @@
 
 class FinalDestination::HTTP < Net::HTTP
   def connect
+    raise ArgumentError.new("address cannot be nil or empty") unless @address.present?
+
     original_open_timeout = @open_timeout
     return super if @ipaddr