Update Magnum with new scene tools, bindings and plugin additions

[mosra]

Motivation and Context

Continuation of #2100, with another ~10 days and >10 thousand lines of changes on the Magnum side. A large batch of features got finished and merged to master this time, and some breaking changes were needed to keep the API organized -- see below.

What's new:

• Fixed some minor build issues with GCC 13
• New expanded() and collapsed() APIs on multidimensional strided (bit) array views, similar to what Numpy's reshape() does
• New pixelFormat() helper API for conveniently changing component count or sRGB encoding of an arbitrary PixelFormat
• (Contributed by a 3rd party) The UfbxImporter plugin now has complete support for FBX skins and animations, allowing @0mdc to replace Assimp's broken FBX loading
• New simplifyFailEmpty option in MeshOptimizerSceneConverter that'll make it fail in case simplification produces an empty mesh. By default it produces an empty MeshData, which can't be used to produce a valid glTF file. Related is also a minor fix to a bug that caused the plugin to trigger an assertion in presence of an empty mesh.
• New forceBitDepth option for StbImageImporter and PngImporter that allows opening 16-bit images as 8-bit and vice versa. Added to work around a limitation of the Basis library which can only deal with 8-bit-per-pixel images.

New tools, especially of interest to @jturner65:

• SceneTools::parentsBreadthFirst() and SceneTools::childrenDepthFirst() utilities for returning a scene hierarchy in various orders depending on desired use case
• SceneTools::combineFields() that makes it possible to conveniently compose a SceneData out of loose data arrays.
• SceneTools::filterFields(), SceneTools::filterOnlyFields() and SceneTools::filterExceptFields() for removing a particular field (such as mesh assignments, or transformations) from a scene as a whole. These are similar to existing attribute filtering tools for meshes and materials.
• SceneTools::filterFieldEntries() for removing individual field entries (for example, all references to a particular flowerpot) from the scene
• SceneTools::filterObjects() for removing individual objects (for example, openings objects) from the scene
• A unified set of MeshTools::copy(), MaterialTools::copy() and SceneTools::copy() helpers for the rare cases where a mesh, material or scene data instance needs to be copied
• Except for combineFields(), all of the above are also exposed to Python in the scenetools and meshtools modules, together with an ability to export scenes through trade.AbstractSceneConverter.

Additions to the magnum-sceneconverter utility, which you however usually use via the prebuilt tools instead of through Habitat:

• New --passthrough-on-mesh-converter-failure and --passthrough-on-image-converter-failure options, making it possible to fall back to the original data for a particular failed -M or -P conversion
• New --prefer option, adding an ability to choose an alternative plugin implementation, such as SpngImporter instead of the default PngImporter that may be as much as 2x faster
• New --set option, allowing to set global plugin options like overriding bit depth of imported images, quality of exported JPEGs or Basis compression options. This used to be only partially possible before, done in a hacky way with [imageConverter] options in GltfSceneConverter, and --set is now the preferred way.
• New --object-hierarchy option for --info-objects that'll visualize the object hierarchy by indenting the output. Useful for discovering object groupings or redundant nodes in a scene.

⚠️ Breaking changes: ⚠️

• Trade::LightData::Type is now Trade::LightType so it's no longer needed to include the whole class for an enum declaration
• SceneTools::flattenTransformationHierarchy3D() is renamed to SceneTools::absoluteFieldTransformations3D(), same change is done for the scenetools.flatten_transformation_hierarchy3d() Python binding that's now scenetools.absolute_field_transformations3d()
• MeshTools::owned() is now MeshTools::copy()

The old C++ APIs are still present but marked as deprecated and thus causing compiler warnings. For the Python bindings however it's a hard change with no fallback. I updated the affected code here, some changes are needed in habitat-lab as well, but there I unfortunately have no easy way to verify the changes. @aclegg3 can you handle the updates on the habitat-lab side? Thank you.

How Has This Been Tested

🍏

[jturner65]

LGTM! Farewell T R I M E S H!!!

[mosra]

This now includes also a GLFW application EGL fix for @eundersander and #2116.

[aclegg3]

Assuming the tests pass on facebookresearch/habitat-lab#1356 against this branch I think we can merge both.