PMM-15067: show Grafana alerting for anon users

[fabio-silva]

https://jira.percona.com/browse/PMM-15067

[JNKPercona]

Looks like there are outdated source branches.
Please update them and restart the job
percona/pmm#5625

[JNKPercona]

Looks like there are outdated source branches.
Please update them and restart the job
percona/pmm#5625

[JNKPercona]

Server docker: perconalab/pmm-server-fb:PR-4519-0bdb6c4
Client docker: perconalab/pmm-client-fb:PR-4519-0bdb6c4
Watchtower docker: perconalab/pmm-watchtower-fb:PR-4519-0bdb6c4
Client tarball: https://s3.us-east-2.amazonaws.com/pmm-build-cache/PR-BUILDS/pmm-client/pmm-client-PR-4519-0bdb6c4.tar.gz
Staging instance: https://pmm.cd.percona.com/job/pmm3-aws-staging-start/parambuild/?DOCKER_VERSION=perconalab/pmm-server-fb:PR-4519-0bdb6c4&CLIENT_VERSION=https://s3.us-east-2.amazonaws.com/pmm-build-cache/PR-BUILDS/pmm-client/pmm-client-PR-4519-0bdb6c4.tar.gz

[JNKPercona]

API tests have succeded: https://pmm.cd.percona.com/job/pmm3-api-tests/6994/