test: fix test-tls-no-sslv3 for OpenSSL 3
OpenSSL 3 has changed the format of the error message for an unknown option to the CLI. Update the test to allow for the older and newer message formats.
Refs: https://github.com/openssl/openssl/pull/10774
Example message from an OpenSSL 1.1.1 CLI:
$ openssl s_client -ssl3
s_client: Option unknown option -ssl3
s_client: Use -help for summary.
$
OpenSSL 3.0.0 alpha13:
$ openssl s_client -ssl3
openssl s_client: Unknown option: -ssl3
openssl s_client: Use -help for summary.
$
cc @danbev