ports-mgmt/poudriere{,-devel}: Drop ca_root_nss dependency.

[des]

Summary

Since the CERTS option no longer installs certificates, we rename it
to MANIFESTS.

MFH: 2023Q4

[bdrewery]

This doesn’t seem right. I’m away from computer today so can’t verify. What is the motivation for dropping ca_root_nss?

[des]

In D42070#960267, @bdrewery wrote:

What is the motivation for dropping ca_root_nss?

It's not needed. We've shipped a fully populated trust root in base since 12.2.

[bdrewery]

In D42070#960269, @des wrote:

In D42070#960267, @bdrewery wrote:

What is the motivation for dropping ca_root_nss?

It's not needed. We've shipped a fully populated trust root in base since 12.2.

Thanks.