Revert "Revert "Switched SkSL parser APIs from char* + length to string_view""

This reverts commit 85ed60515944ccb417e180936a584d400b173837.

TBR=brianosman@google.com,johnstiles@google.com

Change-Id: I09a8a821ceb2b3d525cbca5e52af5cad96d1e2b5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/418617
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
10 files changed