chore(api): support ignore password if login source type is LDAP for creating user API (#28491) (#28525)

Backport #28491 by @appleboy

- Modify the `Password` field in `CreateUserOption` struct to remove the
`Required` tag
- Update the `v1_json.tmpl` template to include the `email` field and
remove the `password` field

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
Co-authored-by: Bo-Yi Wu <appleboy.tw@gmail.com>

templates/swagger/v1_json.tmpl

@@ -18328,8 +18328,7 @@
       "type": "object",
       "required": [
         "username",
-        "email",
-        "password"
+        "email"
       ],
       "properties": {
         "created_at": {