Add lightsail_static_ip module (ansible-collections#259)

Add lightsail_static_ip module

SUMMARY
Adds a module to manage AWS Lightsail Static IP addresses
Fixes ansible-collections#250
ISSUE TYPE

New Module Pull Request

COMPONENT NAME
community.aws.lightsail_static_ip
ADDITIONAL INFORMATION
As per my earlier pull request, this is part of larger work to add functionality to this module in terms of managing AWS Lightsail.
Apologies if there are any issues/I have missed anything. I am new to Ansible development, but have tried to follow the contribution docs as best as I can.
Example playbook:
    - name: create static IP
      community.aws.lightsail_static_ip:
        name: "test_static"
        state: present
        region: ap-southeast-2

Reviewed-by: Jill R <None>
Reviewed-by: Mark Chappell <None>

lightsail_static_ip.py

@@ -0,0 +1,148 @@
+#!/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 = '''
+---
+module: lightsail_static_ip
+version_added: 4.1.0
+short_description: Manage static IP addresses in AWS Lightsail
+description:
+  - Manage static IP addresses in AWS Lightsail.
+author:
+  - "Daniel Cotton (@danielcotton)"
+options:
+  state:
+    description:
+      - Describes the desired state.
+    default: present
+    choices: ['present', 'absent']
+    type: str
+  name:
+    description: Name of the static IP.
+    required: true
+    type: str
+extends_documentation_fragment:
+  - amazon.aws.aws
+  - amazon.aws.ec2
+'''
+
+
+EXAMPLES = '''
+- name: Provision a Lightsail static IP
+  community.aws.lightsail_static_ip:
+    state: present
+    name: my_static_ip
+  register: my_ip
+
+- name: Remove a static IP
+  community.aws.lightsail_static_ip:
+    state: absent
+    name: my_static_ip
+'''
+
+RETURN = '''
+static_ip:
+  description: static_ipinstance data
+  returned: always
+  type: dict
+  sample:
+    arn: "arn:aws:lightsail:ap-southeast-2:184297340509:StaticIp/d8f47672-c261-4443-a484-4a2ec983db9a"
+    created_at: "2021-02-28T00:04:05.202000+10:30"
+    ip_address: "192.0.2.5"
+    is_attached: false
+    location:
+        availability_zone: all
+        region_name: ap-southeast-2
+    name: "static_ip"
+    resource_type: StaticIp
+    support_code: "677585553206/192.0.2.5"
+'''
+
+try:
+    import botocore
+except ImportError:
+    # will be caught by AnsibleAWSModule
+    pass
+
+from ansible.module_utils.common.dict_transformations import camel_dict_to_snake_dict
+
+from ansible_collections.amazon.aws.plugins.module_utils.core import AnsibleAWSModule
+from ansible_collections.amazon.aws.plugins.module_utils.core import is_boto3_error_code
+
+
+def find_static_ip_info(module, client, static_ip_name, fail_if_not_found=False):
+
+    try:
+        res = client.get_static_ip(staticIpName=static_ip_name)
+    except is_boto3_error_code('NotFoundException') as e:
+        if fail_if_not_found:
+            module.fail_json_aws(e)
+        return None
+    except botocore.exceptions.ClientError as e:  # pylint: disable=duplicate-except
+        module.fail_json_aws(e)
+    return res['staticIp']
+
+
+def create_static_ip(module, client, static_ip_name):
+
+    inst = find_static_ip_info(module, client, static_ip_name)
+    if inst:
+        module.exit_json(changed=False, static_ip=camel_dict_to_snake_dict(inst))
+    else:
+        create_params = {'staticIpName': static_ip_name}
+
+        try:
+            client.allocate_static_ip(**create_params)
+        except botocore.exceptions.ClientError as e:
+            module.fail_json_aws(e)
+
+        inst = find_static_ip_info(module, client, static_ip_name, fail_if_not_found=True)
+
+        module.exit_json(changed=True, static_ip=camel_dict_to_snake_dict(inst))
+
+
+def delete_static_ip(module, client, static_ip_name):
+
+    inst = find_static_ip_info(module, client, static_ip_name)
+    if inst is None:
+        module.exit_json(changed=False, static_ip={})
+
+    changed = False
+    try:
+        client.release_static_ip(staticIpName=static_ip_name)
+        changed = True
+    except botocore.exceptions.ClientError as e:
+        module.fail_json_aws(e)
+
+    module.exit_json(changed=changed, static_ip=camel_dict_to_snake_dict(inst))
+
+
+def main():
+
+    argument_spec = dict(
+        name=dict(type='str', required=True),
+        state=dict(type='str', default='present', choices=['present', 'absent']),
+    )
+
+    module = AnsibleAWSModule(argument_spec=argument_spec)
+
+    client = module.client('lightsail')
+
+    name = module.params.get('name')
+    state = module.params.get('state')
+
+    if state == 'present':
+        create_static_ip(module, client, name)
+    elif state == 'absent':
+        delete_static_ip(module, client, name)
+
+
+if __name__ == '__main__':
+    main()