feat: add metric for container health check status

[mateuszdrab]

This PR adds the result of the container's health check as a metric

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.

[arulrajnet]

Any update on this?

[dtap001]

Please merge this!!!

[SebaNar]

Hey, please merge asap. It's a very important feature.

[Pre-Z]

Please merge this, it is an essential feature.

[murcu]

Merge this, pretty please 🥺🙏

[patrikmakrai]

could you please merge this?

[toppet]

Can we expect this feature to be merged soon? We really need this!

[fpeter76]

Please merge this!

[bandrika]

Please merge this!

[szkorg]

Merge pls.

[chayuto]

please merge. ::pray::

[dtap001]

Any update?

[chiaratwint]

Please merge!

[SebaNar]

Yes, please do it asap.

[denysbondar2]

Hey @cwangVT, could you please take a look at this PR, because it is beneficial enchantment. Thank you!