TP: Remove calls to deprecated TO API endpoints

[mitchell852]

I'm submitting a ...

• bug report
• new feature / enhancement request
• improvement request (usability, performance, tech debt, etc.)
• other

Traffic Control components affected ...

• CDN in a Box
• Documentation
• Grove
• Traffic Control Client
• Traffic Monitor
• Traffic Ops
• Traffic Ops ORT
• Traffic Portal
• Traffic Router
• Traffic Stats
• Traffic Vault
• unknown

Current behavior:

TP currently makes calls to API endpoints that will soon be deprecated with api 1.x. These calls need to be removed or changed to another suitable endpoint.

You can determine which calls TP makes to soon-to-be-deprecated api 1.x routes as they look like this:

$http.get(ENV.api['legacy']

API calls are made in the following services: https://github.com/apache/trafficcontrol/tree/master/traffic_portal/app/src/common/api

Expected / new behavior:

TP does not make any API calls to deprecated (legacy) endpoints.

Minimal reproduction of the problem with instructions:

[mitchell852]

this is done