* Update default SDL2 to 2.32.10 (steamrt/tasks#798)
* Update default SDL2 to provide `/usr/lib/*/sdl2-classic/`, in preparation for a future transition to sdl2-compat (steamrt/tasks#774)
* Resync sdl2-compat packaging with Debian testing (steamrt/tasks#774)
* Update SDL3 to 3.2.22 plus post-release bug fixes (steamrt/tasks#798)
### Container runtime
* Fix a potential crash during game launch on unusual systems (steam-runtime-tools!849)
* Improve correctness of different JSON manifests referring to the same Vulkan/EGL/etc. driver on different architectures (steamrt/tasks#805)
* Fix handling of `LD_PRELOAD` values resembling `libfoo.so.0` (steam-runtime-tools!830)
*`STEAM_COMPAT_RUNTIME_SDL2=classic` will select "classic" SDL2, even in future versions where sdl2-compat might become the default (steamrt/tasks#774)
* Slightly improve startup performance by making better use of cache (steam-runtime-tools!831, steam-runtime-tools!832)
* Add experimental options to select separate graphics stack providers for x86_64 and i386 (steamrt/tasks#785)
### Diagnostic tools
* x86_64 is now sorted before i386 in `steam-runtime-system-info` output
### SDK
* Add `python3-requests` and its dependencies (steamrt/tasks#799)