disable pg tests

4 jobs for master in 1 minute and 42 seconds (queued for 2 seconds)
latest
Status Name Job ID Coverage
  Test
passed php7.3_mariadb10.2 #1454502

00:01:14

passed php7.3_mariadb10.3 #1454503

00:01:14

passed php7.3_mysql5.7 #1454500

00:01:35

passed php7.3_mysql8 #1454501

00:01:42