Rename GrSamplerState::Filter::kBilerp to kLinear

Aligning with SkSamplingMode.

Bug: skia:10344

Change-Id: Ie303c3ca1d664d4c23f779b84c9a661076bd74d4
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/303022
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
34 files changed