Matrix service grafana dashboard is not in sync with v1

[parthshahva]

The matrix service grafana dashboard still reflects v0 + caching. In order to be useful for monitoring, the dashboard should be updated to the v1 implementation.

https://metrics.dev.data.humancellatlas.org/d/matrix-dev/matrix-dev?orgId=1
https://metrics.dev.data.humancellatlas.org/d/matrix-integration/matrix-integration?orgId=1
https://metrics.dev.data.humancellatlas.org/d/matrix-staging/matrix-staging?orgId=1
https://metrics.data.humancellatlas.org/d/matrix-prod/matrix-prod?orgId=1