Add ability to set an IP sets description

[l3rady]

Describe the Feature

For the IP Set rules to work this module converts the rules to IP sets but sets the description as blank with no way to configure it.

It does look like the developer did intend at some point to pull the description from the rule but looks for the setting description which isn't set as part of the rule: https://github.com/cloudposse/terraform-aws-waf/blob/main/ipset.tf#L28

Please add the ability to add a description to ipset rules.

Expected Behavior

IP set description set based on config of ip set statement rules. If none set the default "Managed by Terraform" set

Use Case

N/A

Describe Ideal Solution

Add optional description variable to ip_set_reference_statement_rules list

Alternatives Considered

No response

Additional Context

No response

[l3rady]

Closing feature as PEBCAK.

can put description in the statement block.