[Feature request] Add uuid_v5

Hi,

It would be helpful to add uuid bloblang functions like the `uuid-ossp` postgres extension.

Benthos already use `github.com/gofrs/uuid` package which provides all necessary functions.

Desired functions:

- uuid_nil() string
- uuid_ns_dns() string
- uuid_ns_url() string
- uuid_ns_oid() string
- uuid_ns_x500() string
- uuid_generate_v5(string, string) string

Regards.