Revert "Revert "Revert "proc: enhance time-average nr_running stats"""

This reverts commit c75cf7b606a686deb0e0804507b677399b1c27d7.
Revert "Revert "Revert "scheduler: Re-compute time-average nr_running on read"""

This reverts commit d94a37001181683091c0c5aa2e123ffde6bfb0f2.
Revert "Revert "Revert "scheduler: compute time-average nr_running per run-queue"""

This reverts commit f1ee2ece3149907c0f9ee2dca08c10912f45c727.
Revert "Revert "Revert "rq_stats: add run queue statistic collection to kernel tick scheduler"""

This reverts commit 6cdd256647205f5c51d6a6036ac622de1f7bbe8e.