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.

從帳戶/使用者建立表單以及對應的 LDAP/SAML 帳戶建立 API 路徑開始。確認對於這些帳戶類型，密碼欄位如何變成必填，並檢查 ldap.username.attribute 和 saml2.user.attribute 設定。完成的條件是：建立 LDAP 和 SAML 帳戶時不再顯示或要求密碼，而其他帳戶類型維持目前的行為。

由索引模型根據 Issue 內容生成。