Add CPU monitor in CI

[cffls]

The CPU usage script will monitor cdk-erigon, and fail if the average usage is greater than a threshold.
Sample output:

Monitoring interrupted. Analyzing collected data...

=== CPU Usage Analysis for all cdk-erigon processes ===
Number of measurements: 5
Average Combined CPU Usage: 5.4%
Peak Combined CPU Usage: 6.7%
Threshold: 80%

Final process state:
Individual process details:
PID        CPU%     Command
----------------------------------------
246[88](https://github.com/0xPolygonHermez/cdk-erigon/actions/runs/11602692034/job/32309070380?pr=1389#step:11:89)      0.0      /sbin/docker-init -- /usr/local/share/proc-runner/proc-runner.sh cdk-erigon --pprof=true --pprof.addr 0.0.0.0 --config /etc/cdk-erigon/config.yaml
24725      0.0      /bin/sh /usr/local/share/proc-runner/proc-runner.sh cdk-erigon --pprof=true --pprof.addr 0.0.0.0 --config /etc/cdk-erigon/config.yaml
24726      0.0      cdk-erigon --pprof=true --pprof.addr 0.0.0.0 --config /etc/cdk-erigon/config.yaml
25620      0.0      /sbin/docker-init -- /usr/local/share/proc-runner/proc-runner.sh cdk-erigon --pprof=true --pprof.addr 0.0.0.0 --config /etc/cdk-erigon/config.yaml
25657      0.0      /bin/sh /usr/local/share/proc-runner/proc-runner.sh cdk-erigon --pprof=true --pprof.addr 0.0.0.0 --config /etc/cdk-erigon/config.yaml
25658      6.7      cdk-erigon --pprof=true --pprof.addr 0.0.0.0 --config /etc/cdk-erigon/config.yaml
----------------------------------------

SUCCESS: CPU usage (5.4%) is within threshold of 80%

[cffls]

CPU utilization test has failed as expected:

Final process state:
Individual process details:
PID        CPU%     Command
----------------------------------------
245[93](https://github.com/0xPolygonHermez/cdk-erigon/actions/runs/11617146310/job/32351693971?pr=1389#step:11:94)      0.0      /sbin/docker-init -- /usr/local/share/proc-runner/proc-runner.sh cdk-erigon --pprof=true --pprof.addr 0.0.0.0 --config /etc/cdk-erigon/config.yaml
24629      0.0      /bin/sh /usr/local/share/proc-runner/proc-runner.sh cdk-erigon --pprof=true --pprof.addr 0.0.0.0 --config /etc/cdk-erigon/config.yaml
24630      0.0      cdk-erigon --pprof=true --pprof.addr 0.0.0.0 --config /etc/cdk-erigon/config.yaml
25534      0.0      /sbin/docker-init -- /usr/local/share/proc-runner/proc-runner.sh cdk-erigon --pprof=true --pprof.addr 0.0.0.0 --config /etc/cdk-erigon/config.yaml
25571      0.0      /bin/sh /usr/local/share/proc-runner/proc-runner.sh cdk-erigon --pprof=true --pprof.addr 0.0.0.0 --config /etc/cdk-erigon/config.yaml
25572      100.0    cdk-erigon --pprof=true --pprof.addr 0.0.0.0 --config /etc/cdk-erigon/config.yaml
----------------------------------------

ERROR: Average CPU usage ([98](https://github.com/0xPolygonHermez/cdk-erigon/actions/runs/11617146310/job/32351693971?pr=1389#step:11:99).8%) exceeded threshold of 80%