Add new DNS API version

[alexwilcox9]

Adds support for DS and TLSA records as well as DNSSEC support

Used in hashicorp/terraform-provider-azurerm#28213

[hashicorp-cla-app]

All committers have signed the CLA.

[stephybun]

Thanks for this PR @alexwilcox9. Preview versions have a tendency to contain unexpected breaking changes, whether we allow preview versions to be used or not depends on several factors e.g. how popular/heavily used is the service, how pivotal is it in a customer's environment/infrastructure.

dns is a service we would want to be really careful about not introducing unforseen breaking changes so I've asked our counterparts at Microsoft to reach out to the service team for information on whether there are plans for this to go into a stable version (in which case we would prefer to wait for that to happen instead of introducing this) and whether they can provide some assurances that this won't contain any breaking changes going forwards.

I'll let you know once we have some feedback and whether we can proceed with this.