MDEV-34214: allow intermediate certs in wsrep

* Modify scripts/wsrep_sst_common.sh to allow handling of intermediate CA certificates present in ssl_cert file.
Signed-off-by: Julius Goryavsky <julius.goryavsky@mariadb.com>

scripts/wsrep_sst_common.sh

@@ -1333,6 +1333,7 @@ verify_ca_matches_cert()
     errmsg=$("$OPENSSL_BINARY" verify -verbose \
                  ${ca:+ -CAfile} ${ca:+ "$ca"} \
                  ${cap:+ -CApath} ${cap:+ "$cap"} \
+                 -untrusted "$cert" \
                  "$cert" 2>&1) || not_match=1
 
     if [ $not_match -eq 1 ]; then