Prevent category assessment and profile edit submissions

HM-5076: Prevent application and assessment submissions (#1034)

* Add disabled/read-only properties to field components

* Disable form fields/buttons for applications

* Remove Update Profile button on profile page

* Update application page alert

* Disable form fields on seller assessments page

* Disable submit/save buttons

* Update category dashboard

* Update seller assessment flow page

* Remove button from opportunity page

* Remove add/remove product links

* Remove Change links on assessment review page

* Remove preview & submit steps from application page

* Disable Start Now button on application page

* Remove test to check validation on submission

* Update test snapshots

* Remove unused variable

* Remove unused property

* Update category assessment page alert

* Add message on opportunity page when seller not approved in category