GH-587: Remove computed property from set_user_root_attributes

[sergiught]

🔧 Changes

As raised in #587 and #83, the Microsoft Azure AD Connection's set_user_root_attributes behavior is different than expected. In order to have the user profile sync on each login, this parameter needs to be omitted from the payload. To do so we need to remove the Computed property from the schema for this value. As well we update our docs to reflect this information.

📚 References

• connection property set_user_root_attributes 'on_each_login' doesn't reflect in tenant #587
• auth0_connection - Azure AD - Sync user profile attributes at each login Toggle not getting enabled  #83

🔬 Testing

📝 Checklist

• All new/changed/fixed functionality is covered by tests (or N/A)
• I have added documentation for all new/changed functionality (or N/A)

[sergiught]

If we keep this as computed we won't be able to actually remove it from the update so we can have it use default for WAAD conns.

[willvedd]

Good solution 👍