Add the user to the order status change note

[robindevitt]

Description

Add the user to the order status change note.

Fixes #3039

How has this been tested?

Manually and reviewed via the order edit screen.

Screenshots

Types of changes

The function add_note has a second parameter added_by_user which by default is false. So this change is setting the added_by_user parameter to true so the user details are shown in the notes.

By default it renders the users display_name. Referenced the screenshot for these below notes.
Note 1: Currently the note author was set to show as LifterLMS
Note 2: Showing the status update made by me with my display name being shown.
Note 3: I changed my display name and then changed the order status, to confirm it shows my updated display name.

Checklist:

• This PR requires and contains at least one changelog file.
• My code has been tested.
• My code passes all existing automated tests.
• My code follows the LifterLMS Coding & Documentation Standards.