feat(registry): support all "managed" record types

[haslersn]

Previously, the registry only supported certain hard-coded record types (A, AAAA, CNAME, NS). With this commit, we instead take the list of types given via --managed-record-types. That means the default now is A, AAAA, CNAME (i.e., NS is no longer included), but I don't think this is a breaking change, because any changes to records that aren't "managed" are filtered out at a later point anyway.

Now other record types (such as TXT) can also be handled by the TXT registry.

I have tested this by creating a DNSEndpoint with TXT targets and then deleting the DNSEndpoint again. The record and heritage record are correctly created and deleted.

Description

Fixes #ISSUE

Checklist

• Unit tests updated
• End user documentation updated

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[mloiseleur]

Thanks for this PR @haslersn !
Wdyt about adding some documentation on registries about this ?

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/ok-to-test

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@haslersn: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-external-dns-unit-test	3e1eb24	link	true	/test pull-external-dns-unit-test

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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