Revert "Raster Pipeline: Use clang::musttail when possible"
Revert "Raster Pipeline: Use clang::musttail when possible"

This reverts commit 003f5711b3ff9296f7d4a5d50548aeabde10c95d.

Reason for revert: Unexpected GM diffs

Original change's description:
> Raster Pipeline: Use clang::musttail when possible
>
> This forces tail call optimization on all stage functions. We still need
> a stack management fallback strategy for other compilers, but this gives
> us a way to simplify/optimize pipelines for our most common environment.
>
> Note that emscripten will claim to support the attribute, but WASM
> itself doesn't. As a result, the back-end will emit an error if we try
> to use the attribute.
>
> Change-Id: I86bed9f95b149fa0ed869e40edf49654424df100
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/569536
> Reviewed-by: Herb Derby <herb@google.com>
> Commit-Queue: Brian Osman <brianosman@google.com>

Change-Id: I70cbf2f9da734f5686003c80e2b8014affd641b0
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/569978
Bot-Commit: Rubber Stamper <d516c4cc2192058ab8dae3d306acbdaf2ce6574f@appspot.gserviceaccount.com>
Auto-Submit: Robert Phillips <95e8ac5504948c7bf91b22c16a8dbb7ae7c66bfd@google.com>
Commit-Queue: Rubber Stamper <d516c4cc2192058ab8dae3d306acbdaf2ce6574f@appspot.gserviceaccount.com>

google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia