UI/API: Don't make password a mandatory parameter for the creation of LDAP/SAML account

### The required feature described as a wish

Issue:

Currently, the password admin user sets for ldap and saml accounts during creation is useless, as the main authentication happens via ldap and saml servers

Since the password is set on the saml or ldap servers, and cloudstack mainly authenticates based on the global setting values of

ldap.username.attribute
saml2.user.attribute

The account/user creation form should not show the password section text box if the admin user wants to create ldap or saml account.

Start with the account/user creation form and the corresponding LDAP/SAML account-creation API paths. Verify how the password field becomes mandatory for these account types and check the ldap.username.attribute and saml2.user.attribute settings. Done means LDAP and SAML creation no longer displays or requires a password while other account types retain their current behavior.

Written by the indexing model from the issue text.