[roll] Roll fuchsia Revert "[kernel][scheduler] Make Rescheduling with arch_blocking_disallowed an error"

This reverts commit 49e0b74b3a6322e861d2e0df8b75a531ab9ef1d3.

Reason for revert: See b/460442928

Original change's description:
> [kernel][scheduler] Make Rescheduling with arch_blocking_disallowed an error
>
> Prior to this change, Scheduler::Reschedule and
> Scheduler::RescheduleMask and would pend a preemption when called in
> an arch_blocking_disallowed context.  That is, they pend a preemption
> and return rather than continue down into RescheduleCommon.  This
> change removes the special case logic for arch_blocking_disallowed.
>
> Now, calling Reschedule or RescheduleMask with
> arch_blocking_disallowed is an error and will result in the existing
> RescheduleCommon assert firing.
>
> The motivation for this change is to remove the only remaining
> non-assert use of arch_blocking_disallowed and to simplify the
> reschedule logic in preparation for use of mp_reschedule_self.
>
> Original-Bug: 42143537
> Original-Bug: 457759524
> Change-Id: I065e3739030151bdfe236f2dc77becf269d7ffef
> Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1415586
> Fuchsia-Auto-Submit: Nick Maniscalco <maniscalco@google.com>
> Reviewed-by: John Grossman <johngro@google.com>
> Commit-Queue: Nick Maniscalco <maniscalco@google.com>
> Reviewed-by: Corey Tabaka <eieio@google.com>

Original-Bug: 42143537
Original-Bug: 457759524
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1422356
Original-Revision: 12219991d0905acb2536abc41b075206d13e990c
GitOrigin-RevId: e8f8a23969976f22b4e5a32067aeae4e605f0a5a
Change-Id: I8cdda43072feb14031d8a4da26daff70dcc52983