libf3d: Improve API for [[nodiscard]] and missing this* return (#1830) #7526

Job	Run time
Update LFS data cache	1m 29s
external-build	2m 49s
android (armeabi-v7a)	2m 53s
android (arm64-v8a)	2m 53s
android (x86)	2m 48s
android (x86_64)	2m 50s
macos_arm (commit, no-bundle, no-static)	7m 47s
linux (commit, standard)	9m 51s
macos_arm (v9.4.0, no-bundle, no-static)	8m 6s
macos (commit)	21m 17s
linux (v9.4.0, standard)	9m 41s
windows (commit, no-static)	15m 52s
macos_arm (v9.3.1, no-bundle, no-static)	7m 27s
macos (v9.4.0)	18m 27s
linux (v9.3.1, standard)	6m 58s
windows (v9.4.0, no-static)	16m 16s
macos_arm (commit, bundle, no-static)	9m 7s
macos (v9.3.1)	18m 49s
linux (v9.2.6, standard)	6m 23s
windows (v9.3.1, no-static)	12m 5s
macos_arm (commit, no-bundle, static)	8m 4s
macos (v9.2.6)	16m 59s
windows (v9.2.6, no-static)	10m 59s
linux (egl, commit, raytracing, optional-deps, no-exclude-deprecated, egl, no-static)	10m 2s
linux (osmesa, commit, raytracing, optional-deps, no-exclude-deprecated, osmesa, no-static)	9m 55s
windows (commit, static)	15m 5s
linux (exclude_deprecated, commit, raytracing, optional-deps, exclude-deprecated, auto, no-static)	10m 17s
coverage	10m 7s
linux (no_optional_deps, commit, no-raytracing, no-optional-deps, no-exclude-deprecated, auto, no...	6m 20s
python-packaging (ubuntu-latest)	4m 0s
linux (static_libs, commit, no-raytracing, optional-deps, no-exclude-deprecated, auto, static)	8m 54s
python-packaging (windows-latest)	7m 2s
sanitizer (address)	13m 2s
python-packaging (macos-13)	4m 38s
sanitizer (thread)	14m 1s
sanitizer (undefined)	9m 55s
static-analysis	7m 7s
	5h 50m 15s

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