Feature/monitor url sharedless

A desire to simplify URL edge monitor. Shared instances seem overkill and require very complex configuration.

Outcomes:

• user can simply add monitor instance and configure it to monitor some URLs
• user can add monitor instance with region configuration and in-place setup complex URL monitoring per region

The new software type edgetest-basic shall be enough to cover even complex scenarios for various regions and classes (like speed requirements), by creating more than one instance for each case.