Run GnuTLS connection tests with TLS 1.3 disabled

Some tests have regressed with TLS 1.2, but I didn't notice because we
are currently not testing it anywhere. Run all the tests with TLS 1.2
as well as TLS 1.3.
1 job for mcatanzaro/rerun-tests in 28 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Test
failed #322139
fedora-x86_64

00:00:28

 
Name Stage Failure
failed
fedora-x86_64 Test
Fail:                  1
Unexpected Pass: 0
Skipped: 0
Timeout: 0

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