Revert "Rename instanceAttribSupport -> drawInstancedSupport"

This reverts commit 17f05c737e44810cb043d781a9760b03f1cb719a.

Reason for revert: chrome

Original change's description:
> Rename instanceAttribSupport -> drawInstancedSupport
> 
> Change-Id: I7d8ff8597849f2b910928867842857e25a12b4b1
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/281582
> Commit-Queue: Chris Dalton <csmartdalton@google.com>
> Reviewed-by: Brian Salomon <bsalomon@google.com>

TBR=bsalomon@google.com,csmartdalton@google.com

Change-Id: I2b28e3066f27b9d63713f93c0b44d7ba92fcdba9
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/281868
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
16 files changed