Bulk import cleanup (ansible-collections#360)

* Split imports and reorder
* Import camel_dict_to_snake_dict and snake_dict_to_camel_dict direct from ansible.module_utils.common.dict_transformations
* Remove unused imports
* Route53 Info was migrated to Boto3 drop the HAS_BOTO check and import
* changelog

This commit was initially merged in https://github.com/ansible-collections/community.aws
See: ansible-collections/community.aws@130cf3c

plugins/modules/cloudwatchlogs_log_group_metric_filter.py

@@ -100,13 +100,10 @@
     ]
 
 """
-from ansible_collections.amazon.aws.plugins.module_utils.core import AnsibleAWSModule, is_boto3_error_code, get_boto3_client_method_parameters
-from ansible_collections.amazon.aws.plugins.module_utils.ec2 import camel_dict_to_snake_dict
 
-try:
-    from botocore.exceptions import ClientError, BotoCoreError, WaiterError
-except ImportError:
-    pass  # caught by AnsibleAWSModule
+from ansible.module_utils.common.dict_transformations import camel_dict_to_snake_dict
+
+from ansible_collections.amazon.aws.plugins.module_utils.core import AnsibleAWSModule
 
 
 def metricTransformationHandler(metricTransformations, originMetricTransformations=None):