[TASK] Temporarly avoid PHPStan composer-max tests fails

PHPStan fails with composer max installation due
changes in the detection. Raising the version to
corresponding version leads to abnormal performance
decrease. Thus not an option we can use.

This change pins phpstan to a fixed version to avoid
failing nightlies until the performance issue in the
PHPStan tool has been fixed.

See: phpstan/phpstan#7903

Used commands:

> composer req --dev "phpstan/phpstan":"1.8.2"

Resolves: #98253
Releases: main, 11.5
Change-Id: I38a31b87c36b9ae4c5915422dd3f09a6fca38b57
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/75600
Tested-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>

composer.json

@@ -111,7 +111,7 @@
 		"php-webdriver/webdriver": "^1.12.1",
 		"phpspec/prophecy": "^1.15.0",
 		"phpspec/prophecy-phpunit": "^2.0.1",
-		"phpstan/phpstan": "^1.8.2",
+		"phpstan/phpstan": "1.8.2",
 		"phpstan/phpstan-phpunit": "^1.1.1",
 		"phpunit/phpunit": "^9.5.21",
 		"typo3/cms-styleguide": "~12.0@dev",