fix: stop loading donor notes when create Give_donor object

[ravinderk]

Performance Improvement Request

User Story

As a site owner, I want my donation form to load faster.

Current Behavior

when donor logged in then on the donation form page, I can see one extra query which we can neglect

Expected Behavior

Run queries only which are useful

Visuals

Possible Solution

Do not load notes when creating Give_Donor object. Move them to on-demand functionality. I think we can use the class __get function to set and fetch donor notes dynamically instead of object creation

Acceptance Criteria

• Give_Donor object has empty notes when creating an object
• Return notes when developer access notes property of Give_Donor class