Cleanup headers and imports (ansible-collections#1738)

Cleanup headers and imports

SUMMARY
Mass update of imports, docs fragments and file headers

Many of the amazon.aws module_utils and docs fragments got moved about, update community.aws to reflect this.
Consistently apply the comment headers as documented at https://docs.ansible.com/ansible/devel/dev_guide/developing_modules_documenting.html#python-shebang-utf-8-coding

ISSUE TYPE

Docs Pull Request
Feature Pull Request

COMPONENT NAME
ADDITIONAL INFORMATION
Header cleanup based upon:
https://docs.ansible.com/ansible/devel/dev_guide/developing_modules_documenting.html#python-shebang-utf-8-coding

Begin your Ansible module with #!/usr/bin/python - this “shebang” allows ansible_python_interpreter to work. Follow the shebang immediately with # -*- coding: utf-8 -*- to clarify that the file is UTF-8 encoded.

and
https://docs.ansible.com/ansible/devel/dev_guide/developing_modules_documenting.html#copyright-and-license

After the shebang and UTF-8 coding, add a copyright line with the original copyright holder and a license declaration. The license declaration should be ONLY one line, not the full GPL prefix.
...
Additions to the module (for instance, rewrites) are not permitted to add additional copyright lines other than the default copyright statement if missing:

Reviewed-by: Alina Buzachis

This commit was initially merged in https://github.com/ansible-collections/community.aws
See: ansible-collections/community.aws@a4f20bf

plugins/modules/ec2_transit_gateway_vpc_attachment.py

@@ -1,12 +1,10 @@
 #!/usr/bin/python
+# -*- coding: utf-8 -*-
+
 # Copyright: Ansible Project
 # GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
 
-from __future__ import absolute_import, division, print_function
-__metaclass__ = type
-
-
-DOCUMENTATION = '''
+DOCUMENTATION = r"""
 module: ec2_transit_gateway_vpc_attachment
 short_description: Create and delete AWS Transit Gateway VPC attachments
 version_added: 4.0.0
@@ -98,13 +96,13 @@
 author:
   - "Mark Chappell (@tremble)"
 extends_documentation_fragment:
-  - amazon.aws.aws
-  - amazon.aws.ec2
-  - amazon.aws.boto3
+  - amazon.aws.common.modules
+  - amazon.aws.region.modules
   - amazon.aws.tags
-'''
+  - amazon.aws.boto3
+"""
 
-EXAMPLES = '''
+EXAMPLES = r"""
 # Create a Transit Gateway attachment
 - community.aws.ec2_transit_gateway_vpc_attachment:
     state: present
@@ -135,9 +133,9 @@
 - community.aws.ec2_transit_gateway_vpc_attachment:
     state: absent
     id: 'tgw-attach-0c0c5fd0b0f01d1c9'
-'''
+"""
 
-RETURN = '''
+RETURN = r"""
 transit_gateway_attachments:
   description: The attributes of the Transit Gateway attachments.
   type: list
@@ -216,11 +214,9 @@
       type: str
       returned: success
       example: '123456789012'
-'''
-
+"""
 
 from ansible_collections.community.aws.plugins.module_utils.modules import AnsibleCommunityAWSModule as AnsibleAWSModule
-
 from ansible_collections.community.aws.plugins.module_utils.transitgateway import TransitGatewayVpcAttachmentManager
 
 

plugins/modules/ec2_transit_gateway_vpc_attachment_info.py

@@ -1,12 +1,10 @@
 #!/usr/bin/python
+# -*- coding: utf-8 -*-
+
 # Copyright: Ansible Project
 # GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
 
-from __future__ import absolute_import, division, print_function
-__metaclass__ = type
-
-
-DOCUMENTATION = '''
+DOCUMENTATION = r"""
 module: ec2_transit_gateway_vpc_attachment_info
 short_description: describes AWS Transit Gateway VPC attachments
 version_added: 4.0.0
@@ -39,14 +37,15 @@
     type: bool
     required: false
     default: false
-author: "Mark Chappell (@tremble)"
+author:
+  - "Mark Chappell (@tremble)"
 extends_documentation_fragment:
-  - amazon.aws.aws
-  - amazon.aws.ec2
+  - amazon.aws.common.modules
+  - amazon.aws.region.modules
   - amazon.aws.boto3
-'''
+"""
 
-EXAMPLES = '''
+EXAMPLES = r"""
 # Describe a specific Transit Gateway attachment.
 - community.aws.ec2_transit_gateway_vpc_attachment_info:
     id: 'tgw-attach-0123456789abcdef0'
@@ -60,9 +59,9 @@
 - community.aws.ec2_transit_gateway_vpc_attachment_info:
     filters:
       transit-gateway-id: tgw-0fedcba9876543210'
-'''
+"""
 
-RETURN = '''
+RETURN = r"""
 transit_gateway_attachments:
   description: The attributes of the Transit Gateway attachments.
   type: list
@@ -141,11 +140,9 @@
       type: str
       returned: success
       example: '123456789012'
-'''
-
+"""
 
 from ansible_collections.community.aws.plugins.module_utils.modules import AnsibleCommunityAWSModule as AnsibleAWSModule
-
 from ansible_collections.community.aws.plugins.module_utils.transitgateway import TransitGatewayVpcAttachmentManager