twister: Fix missing timeout in handler class

In PR #62947 a timeout variable was replaced with a method,
but this timeout was used in another place to start
pytest subprogram. This commit provides a fix.

Signed-off-by: Grzegorz Chwierut <grzegorz.chwierut@nordicsemi.no>

scripts/pylib/twister/twisterlib/runner.py

@@ -1052,7 +1052,7 @@ class ProjectBuilder(FilterBuilder):
             harness = HarnessImporter.get_harness(instance.testsuite.harness.capitalize())
             harness.configure(instance)
             if isinstance(harness, Pytest):
-                harness.pytest_run(instance.handler.timeout)
+                harness.pytest_run(instance.handler.get_test_timeout())
             else:
                 instance.handler.handle(harness)