[runner subcmd] support -v flag for run

[fuweid]

Background

Currently, kperf runner run uses client-go pkg to send requests.
We should use https://pkg.go.dev/k8s.io/klog/v2 to enable debug log for request.
It's helpful to verify request's URL is expected.

Plan

Add -v, number for the log level verbosity flag to run subcommand.

Use klog utils to set log level.

REF: https://github.com/kubernetes/klog/blob/2086216a5034ba7c4e3a4fec7d89c5d0434eb1a0/examples/set_output/usage_set_output.go#L13