Reject fractional Slug replay for direct masks when atlas bilerp is unsupported

When fSupportBilerpFromGlyphAtlas is false (e.g. Chrome's configuration),
direct-mask glyphs are packed in the shared TextAtlasManager with 0
padding. Replaying a Slug with a fractional translation or incompatible
matrix causes sampling outside the glyph's atlas boundaries under MSAA,
leaking neighboring glyph texels across origins.

1. Promote Slug matrix validation to release mode via SlugImpl::canDraw
   in both Ganesh and Graphite Device::drawSlug, dropping draws when
   the matrix difference includes non-integer translation or transform
   without atlas bilerp support.
2. In VertexFiller::boundsAndDeviceMatrix, return empty bounds for direct
   masks when supportBilerpAtlas is false and the transform is not an
   integer translation, dropping the draw and preventing any fractional
   maskToDevice from reaching the GPU.
3. Add unit tests for VertexFiller::boundsAndDeviceMatrix and end-to-end
   fractional Slug replay validation in Ganesh and Graphite.

Bug: 576950618
Change-Id: I4d28a5e831b8e870b8377ba231c67c03567f0e76
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/1405797
Reviewed-by: Thomas Smith <thomsmit@google.com>
Reviewed-by: Nathan Sanchez <nathanasanchez@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>