Fix for qualified import of conftest

Change-Id: Ib878474127f2c334bd938144c2f3e022dd021bce

Author: freddan80

backends/arm/test/common.py

@@ -11,9 +11,9 @@
 from datetime import datetime
 from pathlib import Path
 
-from conftest import is_option_enabled
-
 from executorch.backends.arm.arm_backend import ArmCompileSpecBuilder
+
+from executorch.backends.arm.test.conftest import is_option_enabled
 from executorch.exir.backend.compile_spec_schema import CompileSpec