PMM-13679 Fix postgres directory ownership. (#3479)

(cherry picked from commit 3346e2a)

Author: BupycHuk

build/ansible/roles/postgres/tasks/main.yml

@@ -42,7 +42,7 @@
     state: directory
     owner: pmm
     group: pmm
-    mode: 0766
+    mode: 0700
 
 - name: Initialize Postgres database
   command: /usr/pgsql-14/bin/initdb -D /srv/postgres14 --auth=trust