Inconsistent destination field naming for route table

[gdavison]

The AWS API field names for route table route destinations are DestinationCidrBlock, DestinationIpv6CidrBlock, and DestinationPrefixListId.

In aws_route_table and data.aws_route_table, the inline route fields are cidr_block and ipv6_cidr_block (#15273 adds DestinationPrefixListId). In aws_route and data.aws_route, the fields are named destination_cidr_block, destination_ipv6_cidr_block, and destination_prefix_list_id.

Naming should be made consistent and the old names deprecated.

Affected Resources

• aws_route_table
• data.aws_route_table

[ewbankkit]

For #15273 I am going with destination_prefix_list_id.

[github-actions]

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[github-actions]

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