Revert "moved SkSL BoolLiteral data into IRNode"

This reverts commit a05d27b170ee05efe7f1a724a21a7b78b1ff45c4.

Reason for revert: Google3 roll,

third_party/skia/HEAD/src/sksl/SkSLTestRehydrator.cpp:311:15: error: no type named 'Dehydrator' in namespace 'SkSL'
        SkSL::Dehydrator dehydrator;

Original change's description:
> moved SkSL BoolLiteral data into IRNode
>
> Change-Id: I177b6daf4d6cb024ba20264ab01d0aa68e768a6d
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/319782
> Reviewed-by: John Stiles <johnstiles@google.com>
> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>

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

Change-Id: I76bcdc7ef914448b439df81cd382066980e1251e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/320017
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
13 files changed