[receiver/httpcheck] check if response matches regex

[Amoolaa]

Component(s)

receiver/httpcheck

Is your feature request related to a problem? Please describe.

A status code is often not enough to determine whether there’s been a successful response.

Describe the solution you'd like

I think it would be great if we could check if a response body matches a regex. Potentially, we could also use capture groups to parse fields, and then use OTTL to filter for responses. I think this would probably be best expressed with a new metric that not only captures the status code but also the outcome of the regex match

Describe alternatives you've considered

No response

Additional context

Happy to contribute to make this happen!

[github-actions]

Pinging code owners:

• receiver/httpcheck: @codeboten

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