Update helm chart for 1.8.1 and release 1.0.1 (grafana#3282)

Release 1.8.1

Helm chart stable release and update Alloy to v1.8 (grafana#3245)

* update helm chart for release 1.8

* update helm chart for release 1.8

Release v1.8.0-rc.0

Release helm chart 0.12.6 (grafana#3153)

* Release helm chart 0.12.6

* Update operations/helm/charts/alloy/CHANGELOG.md

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Co-authored-by: Paulin Todev <paulin.todev@gmail.com>

Biuld image build-image/v0.1.17