Fix NC35 fatal in OccOutput, verify+narrow supported version range to 32-35

testbak/ (local, non-AIO docker compat rigs for NC32/33/34/35) found a real
fatal on NC35: OccOutput::setErrorOutput() didn't declare the ": void"
return type the Symfony Console version NC35 bundles now requires on
ConsoleOutputInterface. Fixed by declaring it - compatible with older
Symfony/NC versions too since it only narrows an untyped parent signature.

32/33 were also verified functional (the previously-suspected jQuery
getter-conflict console exception on those versions is real but harmless -
the app attaches via window.jQuery, not window.$).

min-version/max-version narrowed from 30/34 to 32/35: 30/31 were never
actually tested even before this session, so keeping them was an unverified
claim; 35 is now genuinely verified rather than guessed.

lib/Controller/OccOutput.php

@@ -17,7 +17,12 @@ class OccOutput extends BufferedOutput implements ConsoleOutputInterface
     return $this;
   }
 
-  public function setErrorOutput(OutputInterface $error)
+  // NC35 bundles a Symfony Console version whose ConsoleOutputInterface
+  // declares this method `: void` - PHP 8 fatals ("Declaration must be
+  // compatible") without a matching return type here. Declaring `: void`
+  // is a valid narrowing of the untyped signature older Symfony/NC
+  // versions have, so this stays compatible with NC30-34 too.
+  public function setErrorOutput(OutputInterface $error): void
   {
   }