UPSTREAM: sched/eevdf: Sort the rbtree by virtual deadline

Sort the task timeline by virtual deadline and keep the min_vruntime
in the augmented tree, so we can avoid doubling the worst case cost
and make full use of the cached leftmost node to enable O(1) fastpath
picking in next patch.

Change-Id: I60da5bdcb11b137b34fbf043b391f636f4870f0d
Signed-off-by: Abel Wu <wuyun.abel@bytedance.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20231115033647.80785-3-wuyun.abel@bytedance.com


(cherry picked from commit 2227a957)
Bug: 336835203
Signed-off-by: John Stultz <jstultz@google.com>