Replace assert(Not)Same/Identical() on booleans with assert(Not)True/False() in PHPUnit tests

Problem/Motivation

$this->assertSame(FALSE, ... and $this->assertSame(TRUE, ... is no longer necessary and can be replace with assertTrue/False().

Also $this->assertSame(..., FALSE/TRUE).

See Deprecated assertTrue/False() compatibility overrides in PHPUnit Kernel, Functional and FunctionalJavascript tests

Proposed resolution

Replace assertSame(TRUE/FALSE,... with assertTrue/False().