Use a faster approximation for finding out axis alignment that skips opening the font file, which is slow!

![image](https://github.com/user-attachments/assets/ae840597-b63b-4e46-b857-ac5f09e09ca8)

Trying to use the `GL_BGRA8_EXT` format for the EGL surface backing store on *desktop* OpenGL platforms would fail at: https://github.com/flutter/engine/blob/bde314b856850155d0678632b62c23c84f49afab/shell/platform/embedder/embedder.cc#L869

This seems to be a known issue and both the Linux and Windows embedders have some logic to pick a different format depending on the OpenGL context information:

https://github.com/flutter/engine/blob/088dcfa6cf934088413c5d8af754de1ef7b0d1ca/shell/platform/windows/compositor_opengl.cc#L23-L34

https://github.com/flutter/engine/blob/088dcfa6cf934088413c5d8af754de1ef7b0d1ca/shell/platform/linux/fl_framebuffer.cc#L81-L104

This pull-request gets rid of the hard-coded `GL_BGRA8_EXT` format and makes it configurable by adding a `format` field to the `FlutterOpenGLSurface` struct.

_Disclaimer_: This has only been tested on desktop Linux (Wayland) using the `GR_GL_RGBA8` format which seemed to work as expected.

This change is related to the recently introduced EGL surface backing store: flutter/flutter#58363

[C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style

When making a drawAtlas call with no colors, use the faster shader that does not apply blending.

Now that we're switched to experimental canvas, we can remove the copying of the display list data. The draw can directly refer to pointers from the display list structure, as the draw is processed during DL dispatching.

This is passing consistently now.

https://skia.googlesource.com/skia.git/+log/9ebb7c3640a1..e77818421e91

2024-09-27 skia-autoroll@skia-public.iam.gserviceaccount.com Roll Skia Infra from c13e7159cdd1 to 3ba9cd40c151 (4 revisions)
2024-09-27 skia-autoroll@skia-public.iam.gserviceaccount.com Roll Dawn from 3eee2be83d3f to cef41cc71c85 (6 revisions)
2024-09-27 skia-autoroll@skia-public.iam.gserviceaccount.com Roll vulkan-deps from 8d76160610aa to 64d149df26fd (12 revisions)
2024-09-26 bungeman@google.com Allow multiple equivalent "clang version"s

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-flutter-autoroll
Please CC bdero@google.com,brianosman@google.com,bungeman@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Skia: https://bugs.chromium.org/p/skia/issues/entry
To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md