[BUGFIX] Enforce classic mode in created TYPO3 entrypoint files

`typo3/testing-framework` provides a extended `SystemEnvironmentBuilder`
to ensure correct instance initialization as classic mode in different
test context environment, allowing to manual set the composer mode flag
despite having the PHP define from parent composer installation as source.

`Testbase->setUpInstanceCoreLinks()` additionally provides TYPO3 entrypoints
in form of index.php files, calling the basic bootstrap, based on template
files from system extensions and modified to use the `typo3/testing-framework`
`SystemEnvironmentBuilder` but does not enforce non-composer (classic) mode.
This does not hurt within functional tests but codeception based accceptance
instances misses the enforced classic mode which can lead to several issues,
for example normalizedParams path calculation as basis for additional path
or link generation.

This change modifies the entrypoint creation code to reflect this need and
forces non-composer mode.

Releases: main, 8

Author: sbuerk

Classes/Core/Testbase.php

@@ -228,14 +228,26 @@ public function setUpInstanceCoreLinks(
         // of the testing framework.
         $installPhpExists = file_exists($instancePath . '/typo3/sysext/install/Resources/Private/Php/install.php');
         $entryPointsToSet = [
-            $instancePath . '/typo3/sysext/core/Resources/Private/Php/index.php' => $instancePath . '/index.php',
+            [
+                'source' => $instancePath . '/typo3/sysext/core/Resources/Private/Php/index.php',
+                'target' => $instancePath . '/index.php',
+                'pattern' => '/\\\\TYPO3\\\\CMS\\\\Core\\\\Core\\\\SystemEnvironmentBuilder::run\(\);/',
+                'replacement' => '\TYPO3\TestingFramework\Core\SystemEnvironmentBuilder::run(0, 0, false);',
+            ],
         ];
         if ($installPhpExists && in_array('install', $coreExtensions, true)) {
-            $entryPointsToSet[$instancePath . '/typo3/sysext/install/Resources/Private/Php/install.php'] = $instancePath . '/typo3/install.php';
+            $entryPointsToSet[] = [
+                'source' => $instancePath . '/typo3/sysext/install/Resources/Private/Php/install.php',
+                'target' => $instancePath . '/typo3/install.php',
+                'pattern' => '/\\\\TYPO3\\\\CMS\\\\Core\\\\Core\\\\SystemEnvironmentBuilder::run\(1\);/',
+                'replacement' => '\TYPO3\TestingFramework\Core\SystemEnvironmentBuilder::run(1, 0, false);',
+            ];
         }
         $autoloadFile = dirname(__DIR__, 4) . '/autoload.php';
 
-        foreach ($entryPointsToSet as $source => $target) {
+        foreach ($entryPointsToSet as $entryPointToSet) {
+            $source = $entryPointToSet['source'];
+            $target = $entryPointToSet['target'];
             if (($entryPointContent = file_get_contents($source)) === false) {
                 throw new \UnexpectedValueException(sprintf('Source file (%s) was not found.', $source), 1636244753);
             }
@@ -244,11 +256,9 @@ public function setUpInstanceCoreLinks(
                 $this->findShortestPathCode($target, $autoloadFile),
                 $entryPointContent
             );
-            $entryPointContent = (string)preg_replace(
-                '/\\\\TYPO3\\\\CMS\\\\Core\\\\Core\\\\SystemEnvironmentBuilder::run\(/',
-                '\TYPO3\TestingFramework\Core\SystemEnvironmentBuilder::run(',
-                $entryPointContent
-            );
+            $pattern = $entryPointToSet['pattern'];
+            $replacement = $entryPointToSet['replacement'];
+            $entryPointContent = (string)preg_replace($pattern, $replacement, $entryPointContent);
             if ($entryPointContent === '') {
                 throw new \UnexpectedValueException(
                     sprintf('Error while customizing the source file (%s).', $source),