tools/rtla: Add idle state disabling via libcpupower

Tomas Glozarrequested to merge
tglozar/centos-stream-10:RHEL-40744-downstream into main

JIRA: https://issues.redhat.com/browse/RHEL-40744

In addition to disabling all idle states via cpu_dma_latency, use libcpupower to set idle states only for CPUs timerlat is running on. The parameter --deepest-idle-state is added, taking the deepest allowed idle state as an argument. -1 means disable all idle states.

Signed-off-by: Tomas Glozar tglozar@redhat.com

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