[BUGFIX] Ensure to take test instance as class mode instance

The bugfix backport to ensure correct system environment path
building to fix issue #577 missed to correctly set the flag
for non-composer mode for TYPO3 v12 and lead to wrong path
calculations and followup issues within functional tests.

This is fixed by handing over a correct override value within
the functional test bootstrap.

[1] #577
[2] #633

Resolves: #658
Related: #633
Related: 409c2b8
Releases: 8

Author: sbuerk

Classes/Core/Testbase.php

@@ -747,7 +747,7 @@ public function setUpBasicTypo3Bootstrap($instancePath): ContainerInterface
         if ($hasConsolidatedHttpEntryPoint) {
             SystemEnvironmentBuilder::run(0, SystemEnvironmentBuilder::REQUESTTYPE_CLI, false);
         } else {
-            SystemEnvironmentBuilder::run(1, SystemEnvironmentBuilder::REQUESTTYPE_BE | SystemEnvironmentBuilder::REQUESTTYPE_CLI);
+            SystemEnvironmentBuilder::run(1, SystemEnvironmentBuilder::REQUESTTYPE_BE | SystemEnvironmentBuilder::REQUESTTYPE_CLI, false);
         }
         $container = Bootstrap::init($classLoader);
         // Make sure output is not buffered, so command-line output can take place and