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**Problem:**
- Previous charts cannot satisfy the project level monitoring deploying design
- Grafana cannot be restarted after password changed
- node-exporter cannot be scheduled to `controlpane` or `etcd` role nodes
- Prometheus cannot be started with PVC that provided by some storage provisioner which don't respect the `SecurityContext`

**Solution:**
- Deploy "project level" monitoring with a permission-limit Prometheus
- Remove Grafana account `Secret` and use provisioning instead of `grafana-watch`
- Modify node-exporter `taints`
- Add configurable `SecurityContext` for Prometheus and Alertmanager
- Narrow Prometheus permission

**Issue:**
- https://github.com/rancher/rancher/issues/17039
- https://github.com/rancher/rancher/issues/16962
- https://github.com/rancher/rancher/issues/17030
- https://github.com/rancher/rancher/issues/17256Co-authored-by: orangedeng <jxfa0043379@hotmail.com>

        (+) Only use for Rancher 2.0 Monitoring and Alerting
        (+) Support Grafana to proxy with authorization bearer token to
        Prometheus-Auth agent
        (+) Support Prometheus web to proxy with authorization bearer token
        to Prometheus-Auth agent
        (+) Rich metrics for Kubernetes and Rancher
Co-authored-by: aiwantaozi <michelia.feng@gmail.com>
Co-authored-by: orangedeng <jxfa0043379@hotmail.com>