update repo to gnoi v0.8.0

[brianneville]

gnoi v0.8.0 changed the way that some errors
are reported, so that they use error statuses
instead of custom error message/enum types.

This commit updates the handling for RemoveImage,
StartContainer/UpdateContainer RPCs so that they
no longer use the outdated types.

[coveralls]

Pull Request Test Coverage Report for Build 21224490867

Details

• 5 of 11 (45.45%) changed or added relevant lines in 4 files are covered.
• 2 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.01%) to 63.371%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
client/start_container.go	0	2	0.0%
client/update_container.go	0	2	0.0%
server/remove_image.go	2	4	50.0%

Files with Coverage Reduction	New Missed Lines	%
client/start_container.go	1	79.13%
client/update_container.go	1	74.07%

Totals
Change from base Build 21191943387:	-0.01%
Covered Lines:	1692
Relevant Lines:	2670

---

💛 - Coveralls

[alshabib]

Can you resolve the conflicts here?

[brianneville]

resolved conflicts now.

[brianneville]

btw just a heads up but the deps update https://github.com/openconfig/containerz/pull/56/checks ran without passing any of the build/test CI checks that are required for normal PRs, meaning it was able to update to the gnoi v0.8.0 version, despite the fact that this repo has compilation errors for that version of gnoi (due to message types being removed).

I imagine there are downsides to letting a bot trigger CI runs (potentially you've already considered these and already decided to not let renovate run CI checks), and in reality these kind of breaking changes shouldnt happen too often (fingers crossed).
So maybe its fine to leave the renovate PRs as-is without the extra checks - im just bringing it to your attention since they can break the repo like this