[BUG] - Editing user_data results in destroy/create op for an instance

[thehunmonkgroup]

Describe the bug

Editing user_data results in destroy/create op for an instance -- this is in contrast to the web portal, where user data can be edited in place on an already created instance.

To Reproduce

Steps to reproduce the behavior:

1. Edit user_data on an existing instance
2. run terraform plan
3. Notice that the plan calls for re-creating the instance

Expected behavior

The edit should update the user data in place.