Revert "ICU optimization"

This reverts commit cc6349d390fca0659a98866ca6fdfe8a792242e8.

Reason for revert: Problems with MSAN

Original change's description:
> ICU optimization
> 
> Mainly rearranging the code to perform all ICU iterations once
> and cache the results for the next text layouts.
> 
> Change-Id: I2c2a502c705510eb169bf62efbfcc13b658591e3
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/293336
> Commit-Queue: Julia Lavrova <jlavrova@google.com>
> Reviewed-by: Ben Wagner <bungeman@google.com>

TBR=bungeman@google.com,jlavrova@google.com

Change-Id: I7f7f759178c10349b4c879bafc68a7f8e1065b6a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/294398
Reviewed-by: Julia Lavrova <jlavrova@google.com>
Commit-Queue: Julia Lavrova <jlavrova@google.com>
9 files changed