Only use Prout on endpoints without heavy caching

[rtyley]

Following on from #465, of these two checkpoint endpoints:

• https://manager.typerighter.gutools.co.uk/healthcheck - goes direct to ELB, no caching
• https://checker.typerighter.gutools.co.uk/healthcheck - is behind Cloudfront, and seems to have 1-hour cache time

...because of the long cache time on Checker, I think it's going to be too confusing to point Prout at it?

https://prout-bot.herokuapp.com/view/guardian/typerighter

I think if Prout was making a POST request to checker.typerighter.gutools.co.uk, it would presumably get a fresh response from the cache, but it would probably also need to authenticate, for which in Prout there's no mechanism available at the moment.

[jonathonherbert]

Thanks for this, @rtyley! I don't think we should be caching at all – https://github.com/guardian/typerighter/pull/468 explains why, and removes caching entirely, which should mean this is unnecessary ✨