Update Tanka in the mimir-build-image

[pracucci]

What this PR does

We're running jsonnet tests in CI with a very old version of Tanka. The old version of Tanka gets shipped with an old version of jsonnet, which doesn't support new jsonnet functions. In this PR I'm upgrading Tanka to unblock #8028 (requires std.parseYaml).

Which issue(s) this PR fixes or relates to

N/A

Checklist

• Tests updated.
• Documentation added.
• CHANGELOG.md updated - the order of entries should be [CHANGE], [FEATURE], [ENHANCEMENT], [BUGFIX].
• about-versioning.md updated with experimental features.

[github-actions]

Building new version of mimir-build-image. After image is built and pushed to Docker Hub, a new commit will automatically be added to this PR with new image version grafana/mimir-build-image:pr8030-cf783bf13c. This can take up to 1 hour.

[pstibrany]

could we update mixtool as well? latest version supports new histogram functions when validating rule/alert queries. 🙏

[pstibrany]

could we update mixtool as well? latest version supports new histogram functions when validating rule/alert queries. 🙏

Latest commit is currently this one: monitoring-mixins/mixtool@779c8b3

Commit that updated Prometheus was: monitoring-mixins/mixtool@26d9c7a

[pracucci]

could we update mixtool as well? latest version supports new histogram functions when validating rule/alert queries. 🙏

Will do in a separate PR. I need to unblock #8028 asap.

[pstibrany]

Will do in a separate PR. I need to unblock #8028 asap.

ok, no worries. It was on my todo list for a while, your PR reminded me of it :)

[github-actions]

Not building new version of mimir-build-image. This PR modifies mimir-build-image/Dockerfile, but the image grafana/mimir-build-image:pr8030-cf783bf13c already exists.

[pracucci]

could we update mixtool as well? latest version supports new histogram functions when validating rule/alert queries. 🙏

Will do in a separate PR. I need to unblock #8028 asap.

See: #8032