Fix the actions CI

[misdoro]

Fix the CI:

• Do not call httpstat.us directly, instead start it as a service. See Public Site Down aaronpowell/httpstatus#165
  Generally, using services should be preferred compared to doing external calls.
• Run CI inside a docker image to enable networking to services
• Replace references to google.pl with httpstatus service
• Re-enable jruby-head, skip some tests for now.
• pin protocol-http to 0.50, due to a new exception being raised https://github.com/socketry/protocol-http?tab=readme-ov-file#v0510

Fixes #1045

[koic]

Thank you for working on stabilizing the CI.
The re-enabled jruby-head matrix is still failing, and ruby-head matrix is also failing. What is the current status of how these are being handled in this PR?

[misdoro]

Thank you for working on stabilizing the CI. The re-enabled jruby-head matrix is still failing, and ruby-head matrix is also failing. What is the current status of how these are being handled in this PR?

The -head checks were configured as 'allowed to fail' previously in the ci. I could try to fix them too but it will take some time.

• Ruby-head Installation is not working as expected inside a docker image, I'll likely need to tune the workflow to build ruby from source in that case.
• jruby has some tests failing, I haven't looked in details yet.

[misdoro]

@koic In the end, ruby-head needed a trivial fix, defining a HOME corresponding to what setup-ruby action expects.

Jruby implementation seem to have some issues with httpclient acceptance test concurrent/sequential requests specifically. I've marked those tests to be skipped on jruby for now.

[koic]

Fantastic work! Thank you @misdoro!

[bblimke]

Thank you @misdoro . Awesome work on bringing CI to be green again.