NXP backend: Sync config importer to nxp internal CI changes (#19552)

### Test plan
Existing unit test

Author: robert-kalmar

backends/nxp/tests/config_importer.py

@@ -8,7 +8,7 @@
 logger = logging.getLogger(__name__)
 
 try:
-    import test.python.config as test_config  # noqa F401
+    import config as test_config  # noqa F401
 
     logger.debug("Importing from executorch-integration")
 except ImportError:

backends/nxp/tests/nsys_testing.py

@@ -608,6 +608,7 @@ def _get_caller_name():
 def execute_cmd(cmd, cwd="."):
     env = environ.copy()  # Copy the current environment
     env["LD_LIBRARY_PATH"] = str(NSYS_PATH.parent)
+    logger.debug(f"Running command: {cmd}")
 
     with subprocess.Popen(
         cmd,

backends/nxp/tests/outputs_dir_importer.py

@@ -8,7 +8,7 @@
 logger = logging.getLogger(__name__)
 
 try:
-    import test.python.outputs_dir as outputs_dir  # noqa F401
+    import outputs_dir as outputs_dir  # noqa F401
 
     logger.debug("Importing from executorch-integration")
 except ImportError: