Revert of Repurpose Release_Developer BUILDTYPE and remove SK_DEVELOPER. (patchset #2 id:20001 of https://codereview.chromium.org/1927583002/ )

Reason for revert:
still blocking DEPS roll

Original issue's description:
> Repurpose Release_Developer BUILDTYPE and remove SK_DEVELOPER.
>
> The Release_Developer build type is now used to build Skia with
> release level optimizations but still enable SK_DEBUG. This in turn
> means that SkASSERTS and SkRTConf are available in this mode.
>
> Further we can then remove SK_DEVELOPER as a define as it is true
> iff SK_DEBUG is true.
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1927583002
> DOCS_PREVIEW= https://skia.org/?cl=1927583002
>
> Committed: https://skia.googlesource.com/skia/+/48d6f88479e72efaf9b9d8f9c0769acb1ba773db

TBR=bungeman@gmail.com,bungeman@google.com,benjaminwagner@google.com,djsollen@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/1918253006
18 files changed