Handle invalid URL exception for DAST Site Profile

Related issue - #350833 (closed)

What does this MR do and why?

• Handle invalid URL exception for DAST Site Profile. More info at #350833 (comment 835618931)

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ee/app/models/dast_site_validation.rb

@@ -69,9 +69,9 @@ def validation_url
   end
 
   def self.get_normalized_url_base(url)
-    uri = URI(url)
+    uri = Addressable::URI.parse(url)
 
-    "%{scheme}://%{host}:%{port}" % { scheme: uri.scheme, host: uri.host, port: uri.port }
+    "%{scheme}://%{host}:%{port}" % { scheme: uri.scheme, host: uri.host, port: uri.inferred_port }
   end
 
   private