Allow route53 records overwrite

[LCaparelli]

Describe the Feature

We'd like it to be possible to configure the module to overwrite existing route53 records instead of failing because a record already exists.

Expected Behavior

The module allows overwriting route53 records.

Use Case

We have a GitOps self-service platform for our developers. From time to time we need to import existing stuff into Terraform. In order to run terraform import you need additional permissions which our developers don't have.

If they could just configure the overwrite no additional permission is necessary and developers can move forward without our team's manual intervention.

Describe Ideal Solution

The DNS module we depend on already exposes a variable for this, we just need to expose one variable of our own here and glue things together.

Alternatives Considered

I have not considered alternative solutions for this.

Additional Context

I'm willing to work on this and will send a PR shortly.