Merge release branch 4.20 to main

* 4.20:
  UI: Fix userdata and load balancer selection (apache#10016)
  Prevent password updates for SAML and LDAP users (apache#9999)
  cloudstack-migrate-databases: sql AND added (apache#10033)
  engine/schema: move SQLs to 4.20.0 to 4.20.1 upgrade (apache#10018)
  Remove user from project before deletion (apache#10008)
  Simplify validation for creating volume templates via UI (apache#9828)

Author: DaanHoogland