Bump to PHPStan ^2.1.48 #32447

Job	Run time
Avoid duplicate short class names	18s
Preload php-parser Order	22s
PHPStan	55s
Commented Code	21s
Run with Space in Directory	26s
Finalize classes	22s
Composer Validate	20s
Active Classes	24s
Help and Version	17s
Compatible PHPStan versions	17s
Check fixture classes are different to nodes	18s
Check before/after test fixture on no-changes	19s
Check no "*.php" files in rules Fixture directory	19s
Detect composer dependency issues	19s
PHP Linter	29s
	5m 46s

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