Revert of SkRTConf: reduce functionality to what we use, increase simplicity (patchset #8 id:150001 of https://codereview.chromium.org/2212473002/ )

Reason for revert:
missed GrVkPipelineStateCache

Original issue's description:
> SkRTConf: reduce functionality to what we use, increase simplicity
>
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2212473002
> DOCS_PREVIEW= https://skia.org/?cl=2212473002
> CQ_INCLUDE_TRYBOTS=master.client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD-Trybot
>
> [mtklein]
> TBR=reed@google.com
> Only removing unused public API.
>
> Committed: https://skia.googlesource.com/skia/+/ef59974708dade6fa72fb0218d4f8a9590175c47

TBR=halcanary@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review-Url: https://codereview.chromium.org/2215433003
21 files changed