Bump to PHPStan ^2.1.48 #32446

Job	Run time
Composer Validate	23s
Preload php-parser Order	22s
Commented Code	21s
Avoid duplicate short class names	17s
Run with Space in Directory	16s
Help and Version	19s
PHPStan	52s
Check fixture classes are different to nodes	19s
Compatible PHPStan versions	27s
Finalize classes	21s
Check no "*.php" files in rules Fixture directory	17s
Check before/after test fixture on no-changes	21s
Active Classes	20s
PHP Linter	29s
Detect composer dependency issues	19s
	5m 43s

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