sched: Remove vruntime from trace_sched_stat_runtime()

[ Upstream commit 5fe6ec8f ]

Tracing the runtime delta makes sense, observer can sum over time.
Tracing the absolute vruntime makes less sense, inconsistent:
absolute-vs-delta, but also vruntime delta can be computed from
runtime delta.

Removing the vruntime thing also makes the two tracepoint sites
identical, allowing to unify the code in a later patch.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Stable-dep-of: 0664e2c3 ("sched/deadline: Fix warning in migrate_enable for boosted tasks")
Signed-off-by: Sasha Levin <sashal@kernel.org>