Add aws distro version to sdk.version resource attributes. (#69)

*Issue #, if available:*

In Java,` telemetry.auto.version` resource attribute is being deprecated
([PR](open-telemetry/opentelemetry-java-instrumentation#9065)).
However, We don't find any related change in upstream. It is still
[being
used](https://github.com/open-telemetry/opentelemetry-python/blob/da48e0b131ff34ff382b7d1206f71b2e31929cab/opentelemetry-sdk/src/opentelemetry/sdk/_configuration/__init__.py#L364),
so we are not going to deprecate it in aws-opentelemetry-distro for now.
And we use `aws-opentlemetry-distro` version with "-aws" post-fix to be
the `telemetry.auto.version `, which match with the [Java
implementation](https://github.com/aws-observability/aws-otel-java-instrumentation/blob/294e957afbf48e766e3be9a11638050ef3736904/otelagent/build.gradle.kts#L101).

Testing:
Tested resource attributed are generated:
Before the change:
```
"resource": "BoundedAttributes({'telemetry.sdk.language': 'python', 'telemetry.sdk.name': 'opentelemetry', 'telemetry.sdk.version': '1.22.0', 'service.name': 'unknown_service', 'telemetry.auto.version': '0.43b0'}, maxlen=None)"
```
After the change:
```
"resource": "BoundedAttributes({'telemetry.sdk.language': 'python', 'telemetry.sdk.name': 'opentelemetry', 'telemetry.sdk.version': '1.22.0', 'service.name': 'unknown_service', 'telemetry.auto.version':'0.0.1-aws'}, maxlen=None)"
```


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

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

@@ -4,6 +4,7 @@
 from logging import Logger, getLogger
 from typing import ClassVar, Dict, Type
 
+from importlib_metadata import version
 from typing_extensions import override
 
 from amazon.opentelemetry.distro.always_record_sampler import AlwaysRecordSampler
@@ -80,10 +81,10 @@ class AwsOpenTelemetryConfigurator(_OTelSDKConfigurator):
     # pylint: disable=no-self-use
     @override
     def _configure(self, **kwargs):
-        _initialize_components(kwargs.get("auto_instrumentation_version"))
+        _initialize_components()
 
 
-def _initialize_components(auto_instrumentation_version):
+def _initialize_components():
     trace_exporters, metric_exporters, log_exporters = _import_exporters(
         _get_exporter_names("traces"),
         _get_exporter_names("metrics"),
@@ -94,11 +95,9 @@ def _initialize_components(auto_instrumentation_version):
     id_generator = _import_id_generator(id_generator_name)
     # if env var OTEL_RESOURCE_ATTRIBUTES is given, it will read the service_name
     # from the env variable else defaults to "unknown_service"
-    auto_resource = {}
-    # populate version if using auto-instrumentation
-    if auto_instrumentation_version:
-        auto_resource[ResourceAttributes.TELEMETRY_AUTO_VERSION] = auto_instrumentation_version
 
+    auto_resource: Dict[str, any] = {}
+    auto_resource = _customize_versions(auto_resource)
     resource = get_aggregated_resources(
         [
             AwsEc2ResourceDetector(),
@@ -213,6 +212,13 @@ def _customize_span_processors(provider: TracerProvider, resource: Resource) ->
     return
 
 
+def _customize_versions(auto_resource: Dict[str, any]) -> Dict[str, any]:
+    distro_version = version("aws-opentelemetry-distro")
+    auto_resource[ResourceAttributes.TELEMETRY_AUTO_VERSION] = distro_version + "-aws"
+    _logger.debug("aws-opentelementry-distro - version: %s", auto_resource[ResourceAttributes.TELEMETRY_AUTO_VERSION])
+    return auto_resource
+
+
 def is_app_signals_enabled():
     return os.environ.get(OTEL_AWS_APP_SIGNALS_ENABLED, False)