External DNS - IAM role access to route53 example

[sekka1]

For External DNS would be nice to have example of using sealed secrets for that base64 encoded block of credentials for the Route53 IAM user - would be nice for step-by-step to set that up in the context of this module since it’s something we’re applying

Lets give the IAM perm to the external-dns pod so it has access.

[sekka1]

https://seethatgo.slack.com/archives/C023NPLHCJD/p1628009527047900