DPL-675-1: AROUND SEPTEMBER 2023 -- Remove reports and Sentinel functionality

[sdjmchattie]

User story
As PSD, we would like to reduce technical debt and maintenance of unused components by removing the reports and Sentinel functionality. This will only be done if it is determined that users are not wanting this functionality any more. We should have heard from people about them missing from the menu bar if they are needed.

Who are the primary contacts for this story
Adrianne L, Stuart M

Acceptance criteria
To be considered successful the solution must allow:

• remove the files related to the reports page.
• remove the files related to the Sentinel pages.
• remove the endpoint calls to Lighthouse Service that deal with reports.
• remove any endpoint calls that were exclusive to Sentinel pages.
• remove config for any services we are no longer communicating with.