Revert "Make the SkSL interpreter opt-in"

This reverts commit 5cfbee286ddbd48a82b756c4ceb1d3f3d7e5c120.

Reason for revert: Breaking DM in Google3

Original change's description:
> Make the SkSL interpreter opt-in
> 
> Bug: skia:9230
> 
> Change-Id: I50b707a7dd372882a983a4570810dae05c2a3638
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/225723
> Reviewed-by: Mike Klein <mtklein@google.com>
> Commit-Queue: Brian Osman <brianosman@google.com>

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

Change-Id: I5ba231ab75dd44cc1d22d497f9d7e4b732e3aa14
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:9230
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/225938
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
3 files changed