[roll] Roll fuchsia [kernel] Rename ticks_to_mono to ticks_to_time

This CL renames all instances of ticks_to_mono_ratio with
ticks_to_time_ratio. This was done for two reasons:
1. The platform timer function is called `timer_get_ticks_time_ratio`.
2. This ratio converts ticks to time (nanoseconds) for both the
   monotonic and boot timelines, so ticks_to_mono is confusing.

Original-Bug: 328306129
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1085832
Original-Revision: a93992320feb0be7364af027ccae6ed9d48a6dda
GitOrigin-RevId: d12a7246bc7d6bc93b7e999e348cf56634329314
Change-Id: I58dca87bb852789dfa5d1b9eb41a4d9a98d0638d

Author: Anirudh Mathukumilli

stem

@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="a2be75f784e977b440649d2a95bba7d5bcf181b5"/>
+             revision="a93992320feb0be7364af027ccae6ed9d48a6dda"/>
   </projects>
   <hooks>
     <hook name="install-environment"