WebGUI::Session::Http should go away (#11647)

Move logic out of WebGUI::Session::HTTP and into WebGUI::Session::Response /
::Request; deprecate more functions; change references in core to use
$session->response instead; fix tests that broke because of the change but
not one that merely generate the deprecated warning because I want to know
that the proxying of depricated methods is working.  These can be changed later.

lib/WebGUI/PassiveAnalytics/Flow.pm

@@ -90,7 +90,7 @@ sub exportSomething {
         $csvData .= WebGUI::Text::joinCSV(@row) . "\n";
     }
     $storage->addFileFromScalar($filename, $csvData);
-    $session->http->setRedirect($storage->getUrl($filename));
+    $session->response->setRedirect($storage->getUrl($filename));
 }
 
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