Update test vectors in tls13secretstest

These were still generated by openssl, but with
the previous commit are corroborated by rustls.

(cherry picked from commit eae1982619e90c6b79a6ebc89603d81c13c81ce8)

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2989)