Add job system metrics, run metrics (#2445)

* dstack_job_cpu_count
* dstack_job_cpu_time_seconds_total
* dstack_job_memory_total_bytes
* dstack_job_memory_usage_bytes
* dstack_job_memory_working_set_bytes

* dstack_run_count_total
* dstack_run_count_terminated_total
* dstack_run_count_failed_total
* dstack_run_count_done_total

Closes: #2431

Author: un-def