fix(ensure): check in beforeExit for both ensure plugin interfaces

[bernardobridge]

What

Ensure plugin was not running checks at the end if config is passed like this:

  plugins:
    ensure:
      thresholds:
        - http.response_time.p99: 100
        - http.response_time.p95: 75

This happened since the beforeExit ext was not looking for the second input option.

Testing

Tested with:

config:
  target: http://asciiart.artillery.io:8080
  phases:
    - duration: 10
      arrivalRate: 1
  plugins:
    ensure:
      thresholds:
        - http.response_time.p99: 100
        - http.response_time.p95: 75
scenarios:
  - flow:
    - get:
        url: "/dino"

Also tried other variations (ensure outside of plugins), and no checks. All worked appropriately.

[manfromanotherland]

Thank you @bernardobridge 🙌