In PHP 8.2 and later, setting a value to an undeclared class property is
deprecated and emits a deprecation notice.
So we need to add missing class properties that still need to be declared.
Adding @runTestsInSeparateProcesses and removing setUp() and tearDown() at the
component_test.php, so the test will run in a separate process making sure that
whatever changes happen to the in-memory version of the component class in its thread,
therefore does not impact other tests and makes it more safe.
Meirza