Run `jsonnet-tool test` with `--cache` in the `jsonnet_test` job and persist
the resulting `.jsonnet-tool-test-cache.json` via a GitLab CI `cache:` block so
unchanged fixtures are skipped between pipelines. The cache is keyed on
`.tool-versions` (following the repo's existing cache conventions) so it is
shared across branches/pipelines but invalidated when the jsonnet-tool version
changes. Locally this takes the full suite from ~22s to ~0.05s on a warm cache.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

ci: cache jsonnet-tool test results across pipelines

See merge request !1820

feat(charts-gitlab-io-release): add component to release a chart to charts.gitlab.io

See merge request !1790

## [5.7.0](https://gitlab.com/gitlab-com/gl-infra/common-ci-tasks/-/compare/...) (2026-08-28)

### Features

* **charts-gitlab-io-release:** add component to release a chart to charts.gitlab.io ([11c6fcdf](11c6fcdf))

### Fixes

* only run on canonical, update docs, add tests ([ba2f9faa](ba2f9faa))

### Others

* cache jsonnet-tool test results across pipelines ([d0ca8dcf](d0ca8dcf))
* drop unneeded input variable ([542dca8c](542dca8c))