MM-58847 Sanitize User (#27471)

* add more fields to sanitizeInput on User

* add test for user sanoitizeInput

* add more fields

* remove line, lint fix

* additional fields and sanitize update

* Update user_test.go

* remove fields that are unnecessary to check

* add check to test

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

api/v4/source/users.yaml

@@ -142,6 +142,10 @@
                   type: string
                 nickname:
                   type: string
+                position:
+                  type: string
+                timezone:
+                  $ref: "#/components/schemas/Timezone"
                 auth_data:
                   description: Service-specific authentication data, such as email address.
                   type: string
@@ -911,6 +915,8 @@
                   type: string
                 position:
                   type: string
+                timezone:
+                  $ref: "#/components/schemas/Timezone"
                 props:
                   type: object
                 notify_props: