IPv6 support in ec2_vpc_route_table

[boutetnico]

SUMMARY

Allow usage of IPv6 CIDR in ec2_vpc_route_table.

ISSUE TYPE

• Feature Idea

COMPONENT NAME

ec2_vpc_route_table.py

ADDITIONAL INFORMATION

An old PR tried to fix it already: ansible/ansible#50220.
This would solve the error that occurs when we use an IPv6 CIDR.

An exception occurred during task execution. To see the full traceback, use -vvv. The error was: botocore.exceptions.ClientError: An error occurred (InvalidParameterValue) when calling the CreateRoute operation: Value (::/0) for parameter destinationCidrBlock is invalid. This is not a valid CIDR block.
fatal: [localhost]: FAILED! => {"boto3_version": "1.17.3", "botocore_version": "1.20.3", "changed": false, "error": {"code": "InvalidParameterValue", "message": "Value (::/0) for parameter destinationCidrBlock is invalid. This is not a valid CIDR block."}, "msg": "Couldn't create route: An error occurred (InvalidParameterValue) when calling the CreateRoute operation: Value (::/0) for parameter destinationCidrBlock is invalid. This is not a valid CIDR block.", "response_metadata": {"http_headers": {"cache-control": "no-cache, no-store", "connection": "close", "date": "Wed, 10 Feb 2021 08:07:32 GMT", "server": "AmazonEC2", "strict-transport-security": "max-age=31536000; includeSubDomains", "transfer-encoding": "chunked", "x-amzn-requestid": "42c90a54-5eb3-42fd-a993-6c73cfccbe0f"}, "http_status_code": 400, "request_id": "42c90a54-5eb3-42fd-a993-6c73cfccbe0f", "retry_attempts": 0}}

  ec2_vpc_route_table:
      routes:
        - dest: 0.0.0.0/0
          gateway_id: gw-id
        - dest: ::/0
          gateway_id: gw-id
      subnets:
        - subnet-1
        - subnet-2
        - subnet-3
      vpc_id: vpc-id

[ansibullbot]

Files identified in the description:

• [plugins/modules/ec2_vpc_route_table.py](https://github.com/['ansible-collections/amazon.aws', 'ansible-collections/community.aws', 'ansible-collections/community.vmware']/blob/main/plugins/modules/ec2_vpc_route_table.py)

If these files are inaccurate, please update the component name section of the description or use the !component bot command.

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[ansibullbot]

cc @jillr @s-hertel @tremble @willthames @wimnat
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[abikouo]

@jillr it seems that you are working on this module, could you please address this issue too ?