[CLEANUP] Avoid Hungarian notation for `isForIdentifier` #2173

Job	Run time
PHP Lint (7.2)	13s
PHP Lint (7.3)	24s
PHP Lint (7.4)	32s
PHP Lint (8.0)	16s
PHP Lint (8.1)	14s
PHP Lint (8.2)	43s
PHP Lint (8.3)	12s
PHP Lint (8.4)	18s
Unit tests (7.2)	15s
Unit tests (7.3)	16s
Unit tests (7.4)	10s
Static Analysis (composer:normalize, 8.3)	18s
Unit tests (8.0)	10s
Static Analysis (php:fixer, 8.3)	29s
Unit tests (8.1)	20s
Static Analysis (php:stan, 8.3)	34s
Unit tests (8.2)	39s
Static Analysis (php:rector, 8.3)	42s
Unit tests (8.3)	11s
Unit tests (8.4)	14s
	7m 10s

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