fix(operator): add alertmanager client config to ruler template

[aleert]

What this PR does / why we need it:

Which issue(s) this PR fixes:
Fixes #13181

Checklist

• Reviewed the CONTRIBUTING.md guide (required)
• Documentation added
• Tests updated
• Title matches the required conventional commits format, see here
  • Note that Promtail is considered to be feature complete, and future development for logs collection will be in Grafana Alloy. As such, feat PRs are unlikely to be accepted unless a case can be made for the feature actually being a bug fix to existing behavior.
• Changes that require user attention or interaction to upgrade are documented in docs/sources/setup/upgrade/_index.md
• For Helm chart changes bump the Helm chart version in production/helm/loki/Chart.yaml and update production/helm/loki/CHANGELOG.md and production/helm/loki/README.md. Example PR
• If the change is deprecating or removing a configuration option, update the deprecated-config.yaml and deleted-config.yaml files respectively in the tools/deprecated-config-checker directory. Example PR

[CLAassistant]

All committers have signed the CLA.

[periklis]

LGTM and much appreciated closing this issue. I believe this is a big miss in the code base due to the fact that most of the operator users are using the alertmanager client config per tenant.

Requesting just a quick make bundle-all to update the bundles before releasing this.

[aleert]

@periklis done.

[periklis]

Sorry forgot to point to make docs/operator/api.md to get the docs action passing here.

[aleert]

Should be fine now.

[periklis]

@aleert Thank you very much for your first contribution to the Loki Operator. If you happen to have time, please join on the Grafana Community Slack chanel #loki-operator-dev for a quick chat to tell us where and how you use the Loki Operator. I would appreciate feedback on improvements and future direction.