[PHPUnit90] Speed up AssertRegExpRector with cheap method-name gate

[TomasVotruba]

Perf

AssertRegExpRector subscribes to every STMTS_AWARE node and, for each MethodCall/StaticCall statement, calls TestsNodeAnalyzer::isPHPUnitMethodCallNames(). That helper resolves the caller type (getType() + isInstanceOf TestCase/Assert reflection) first, and only then checks the method name.

So every method-call statement in a codebase pays full TestCase type resolution even when its name is not one of the four asserts the rule cares about.

Added a cheap name gate (isNames(), pure string compare on the call name) before the type-resolving call. Only assertSame/assertEquals/assertNotSame/assertNotEquals calls now reach the costly check. Behavior unchanged - isPHPUnitMethodCallNames still runs with the same name list right after.