Extend the test_quic_write_read() test to include resumption

Extend the test_quic_write_read() test to include resumption

We add an additional loop around test_quic_write_read() to repeat the
test but using a session obtained from the initial iteration to confirm
that we can successfully resume the session.

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Hugo Landau <hlandau@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/21591)