Revert of Rename enums in GrContextFactory to remove "GL" (patchset #4 id:60001 of https://codereview.chromium.org/1845923004/ )

Reason for revert:
Many GM images unexpectedly changed with this CL.

Original issue's description:
> Rename enums in GrContextFactory to remove "GL"
>
> Also, remove kNative as a separate context type and instead make it an alias for kGL or kGLES based on OS.
>
>
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1845923004
>
> Committed: https://skia.googlesource.com/skia/+/2d9c6f81353597aebf5934547e5cba7a872196fb

TBR=egdaniel@google.com,jvanverth@google.com
# Not skipping CQ checks because original CL landed more than 1 days ago.

Review URL: https://codereview.chromium.org/1856703002
21 files changed