[TASK] Move some tests for `Comment` to functional tests #1976

Job	Run time
PHP Lint (7.2)	17s
PHP Lint (7.3)	17s
PHP Lint (7.4)	11s
PHP Lint (8.0)	22s
PHP Lint (8.1)	10s
PHP Lint (8.2)	18s
PHP Lint (8.3)	17s
PHP Lint (8.4)	25s
Static Analysis (composer:normalize, 8.3)	34s
Unit tests (7.2)	12s
Static Analysis (php:fixer, 8.3)	33s
Unit tests (7.3)	21s
Static Analysis (php:stan, 8.3)	39s
Unit tests (7.4)	12s
Unit tests (8.0)	17s
Static Analysis (php:rector, 8.3)	33s
Unit tests (8.1)	12s
Unit tests (8.2)	30s
Unit tests (8.3)	16s
Unit tests (8.4)	28s
	7m 4s

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