Update cadvisor in example for ARM64 runtime

[VladimirKuletski]

More of improvement request than issue.

1. cadvisor latest image is not working on ARM64 platform (OCI)
   Used zcube/cadvisor image as it has pre-compiled ARM64 platform. Works as expected.
   Googled that gcr.io/cadvisor/cadvisor:v0.45.0 should have ARM64. Didn't have time to check.
2. cadvisor permissions
   Required to add privileged: true on Ubuntu to be able to get metrics data. Not sure if it is required for all OS flavors and should go into commit.

[itzg]

Did you mean to post this here? The latest mc-monitor image is already multi-architecture including arm64.

[VladimirKuletski]

mc-monitor/examples/mc-monitor-prom/docker-compose.yml

Line 22 in 39fdbfe

image: gcr.io/cadvisor/cadvisor

has reference to cadvisor image. This is what I had to change to make this example work + priviledged mode.
Sorry for confusion missed file reference initially

[itzg]

Thanks for clarifying. Now that makes sense!