ZTS: Fix zfs_load-key failures on F39

The zfs_load-key tests were failing on F39 due to their use of the
deprecated ssl.wrap_socket function.  This commit updates the test to
instead use ssl.SSLContext() as described in
https://stackoverflow.com/a/65194957.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Closes openzfs#15534
Closes openzfs#15550

tests/zfs-tests/tests/functional/cli_root/zfs_load-key/zfs_load-key_common.kshlib

@@ -123,7 +123,10 @@ if not httpd:
 with open('$HTTPS_PORT_FILE', 'w') as portf:
 	print(port, file=portf)
 
-httpd.socket = ssl.wrap_socket(httpd.socket, server_side=True, keyfile='/$TESTPOOL/snakeoil.key', certfile='$SSL_CA_CERT_FILE', ssl_version=ssl.PROTOCOL_TLS)
+sslctx = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
+sslctx.check_hostname = False
+sslctx.load_cert_chain(certfile='$SSL_CA_CERT_FILE', keyfile='/$TESTPOOL/snakeoil.key')
+httpd.socket = httpd.socket = sslctx.wrap_socket(httpd.socket, server_side=True)
 
 os.chdir('$STF_SUITE/tests/functional/cli_root/zfs_load-key')