Disable warning messages from OTel auto instrumentation (#449)

*Description of changes:*
When setting `OTEL_PYTHON_CONFIGURATOR=aws_configurator`, users see a
verbose warning message:

`Configuration of configurator not loaded because aws_configurator is
set by OTEL_PYTHON_CONFIGURATOR`

These warnings appear when multiple OpenTelemetry configurators are
installed (e.g., default upstream configurators alongside the AWS
configurator). While the behavior is correct, the warnings create noise
in application logs.

Disabling this log message from showing up by default.

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copy, and redistribute this contribution, under the terms of your
choice.

Author: liustve

aws-opentelemetry-distro/src/amazon/opentelemetry/distro/aws_opentelemetry_distro.py

@@ -3,7 +3,7 @@
 import importlib
 import os
 import sys
-from logging import Logger, getLogger
+from logging import ERROR, Logger, getLogger
 
 from amazon.opentelemetry.distro._utils import get_aws_region, is_agent_observability_enabled
 from amazon.opentelemetry.distro.aws_opentelemetry_configurator import (
@@ -22,12 +22,16 @@
 from opentelemetry import propagate
 from opentelemetry.distro import OpenTelemetryDistro
 from opentelemetry.environment_variables import OTEL_PROPAGATORS, OTEL_PYTHON_ID_GENERATOR
+from opentelemetry.instrumentation.auto_instrumentation import _load
+from opentelemetry.instrumentation.logging.environment_variables import OTEL_PYTHON_LOG_LEVEL
 from opentelemetry.sdk.environment_variables import (
     OTEL_EXPORTER_OTLP_METRICS_DEFAULT_HISTOGRAM_AGGREGATION,
     OTEL_EXPORTER_OTLP_PROTOCOL,
 )
 
 _logger: Logger = getLogger(__name__)
+# Suppress configurator warnings from OpenTelemetry auto-instrumentation
+_load._logger.setLevel(os.environ.get(OTEL_PYTHON_LOG_LEVEL, ERROR))
 
 
 class AwsOpenTelemetryDistro(OpenTelemetryDistro):