Isolated tests are not run for 3.x

[Bouncheck]

As can be seen in

scylla-java-driver-matrix/run.py

Lines 161 to 162 in 656a425

	if self._tag.startswith('3'):
	cmd = f"mvn {no_tty} -pl driver-core -Dtest.groups='short,long' -Dtest='{tests_string}' test"

the only test groups that are being run are short and long.
There is a little over 11 test methods annotated with isolated group.

If we want to enable them, then that would require setting up a separate maven execution or separate maven run using already present isolated profile