Arm backend: Fix bug causing empty partition reports (pytorch#19842)

logger.level was used to determine whether to
add the partition_report.txt FileHandler to the logger. This value is
not est by logging.setBasicConfig,
and defaults to 0. This caused empty reports to be output when
intermediate path was set and logging was > info

Instead, use .getEffectiveLevel()

cc @digantdesai @freddan80 @per @zingo @oscarandersson8218 @mansnils
@Sebastian-Larsson @robell @rascani

Signed-off-by: Erik Lundell <erik.lundell@arm.com>

Author: Erik-Lundell

backends/arm/tosa/partitioner.py

@@ -550,7 +550,10 @@ def partition(self, exported_program: ExportedProgram) -> PartitionResult:
         partition_tags = {tag: self.delegation_spec for tag in tags}
 
         tag_constant_data(exported_program)
-        if self.intermediate_path is not None and logger.level <= logging.INFO:
+        if (
+            self.intermediate_path is not None
+            and logger.getEffectiveLevel() <= logging.INFO
+        ):
             intermediate_path = Path(self.intermediate_path)
             intermediate_path.mkdir(parents=True, exist_ok=True)
             file_handler = logging.FileHandler(