Threshold support on MultiHTTP checks: all requests must succeed for a successful test, not only one

[chlete]

What would you like to be added:

It looks like the current MultiHTTP check, when using multiple requests, only one must be true to be considered successful, however, I'd like like to check all the requests to call it successful. Basically the solution would be to make it "AND" and not "OR".

Why is this needed: Some apps need multiple steps/requests and all of them must be "ok".