ssl: allow failure on test_connect_certificate_verify_failed_exception_message

[ This patch only applies to the 3.0 and 3.1 branch. ]

It is a test case for SSLSocket generating an informative error message
on a certificate verification failure. A change in OpenSSL 3.1 broke it
and a generic error message is currently generated.

This is fixed in the 3.2 branch by commit 5113777, but I decided
not to backport the commit to the 3.0 branch because the diff doesn't
apply cleanly.

Author: rhenium

test/openssl/test_ssl.rb

@@ -995,6 +995,9 @@ def test_verify_hostname_failure_error_code
   end
 
   def test_connect_certificate_verify_failed_exception_message
+    # Won't fix on the 3.0 branch
+    return if openssl?(3, 1, 0)
+
     start_server(ignore_listener_error: true) { |port|
       ctx = OpenSSL::SSL::SSLContext.new
       ctx.set_params