Revert "Move runtime shader/colorfilter into SkRuntimeEffect.cpp"

This reverts commit 8980acd6239b4c7c9aa3bf36aee1cb5c208738ae.

Reason for revert: Win-Shared

Original change's description:
> Move runtime shader/colorfilter into SkRuntimeEffect.cpp
> 
> Better organization that lets us share a bunch of code between these
> (very similar) objects.
> 
> Change-Id: Ie559d6e144d8588b98a95d4170e2e6c19d9623bd
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/270736
> Reviewed-by: Mike Reed <reed@google.com>
> Commit-Queue: Brian Osman <brianosman@google.com>

TBR=brianosman@google.com,ethannicholas@google.com,reed@google.com

Change-Id: Ic13d85b7c4f2d593a6c15dde067f118ea5753eb6
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/271600
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
7 files changed