chore: change function name to snake case for linter

Author: yiyuan-he

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

@@ -423,7 +423,7 @@ def _set_remote_type_and_identifier(span: ReadableSpan, attributes: BoundedAttri
             )
         elif is_key_present(span, AWS_BEDROCK_GUARDRAIL_ID):
             remote_resource_type = _NORMALIZED_BEDROCK_SERVICE_NAME + "::Guardrail"
-            remote_resource_identifier = _getBedrockIdentifierFromArn(
+            remote_resource_identifier = _get_bedrock_identifier_from_arn(
                 _escape_delimiters(span.attributes.get(AWS_BEDROCK_GUARDRAIL_ARN))
             )
             cloudformation_primary_identifier = _escape_delimiters(span.attributes.get(AWS_BEDROCK_GUARDRAIL_ARN))
@@ -482,7 +482,7 @@ def _set_remote_type_and_identifier(span: ReadableSpan, attributes: BoundedAttri
         attributes[AWS_CLOUDFORMATION_PRIMARY_IDENTIFIER] = cloudformation_primary_identifier
 
 
-def _getBedrockIdentifierFromArn(arn: str):
+def _get_bedrock_identifier_from_arn(arn: str):
     # NOTE: Bedrock Guardrail ARNs follow this pattern:
     # arn:aws:bedrock:<region>:<account_id>:guardrail/<identifier>
     return arn.split(":")[-1].split("/")[-1]