APIv2 test: add more tests for containers

[Edward5hen]

Tests covering:
container exists
container pause
container unpause
container top
container mount
container unmount

[TomSweeneyRedHat]

@Edward5hen thanks for the contribution! Our CI requires that the commits be signed. Please do git commit --amend-s, rebase and repush your commit. In addition, it looks like lint is not too happy with this either, please check the failed gating test for more information.

[edsantiago]

Could you please move these into a new file? 20-containers.at has grown enormous. This makes it very painful to diagnose individual failures. Thank you.

Also, @baude @jwhonce @mheon, why on Earth do we have a remote endpoint for mount?

[mheon]

@baude wanted it - intended for use cases where podman-remote and podman system service are on the same machine, I think?

[rhatdan]

I have no idea on why we have this for mount, (Which means someone will remind me, why I wanted it)

[Edward5hen]

@TomSweeneyRedHat @edsantiago PTAL

[TomSweeneyRedHat]

@Edward5hen changes LGTM, but I think you'll need to rebase to clear up the test issue. A PR went in very recently that should hopefully fix that once rebased.

[Edward5hen]

@TomSweeneyRedHat rebase is done, but fail some tests. I've no idea why they got "IO error" and "Remote host terminated the handshake". Could you please help check? Thanks.

[edsantiago]

@Edward5hen those were Cirrus flakes. Pressing Re-run made them pass.

/lgtm

[rhatdan]

/approve

[openshift-ci-robot]

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