Update actions/upload-artifact to @v4 (#467) #548

Job	Run time
Linux.2: Debug / steps	9m 21s
Linux.3: static / steps	12m 3s
Linux.1: Release / steps	11m 52s
Linux.4: pkgconfig=OFF, testing=OFF, python=OFF / steps	3m 2s
Linux.6: clang / steps	10m 53s
Linux.5: custom namespace / steps	11m 16s
Linux.7: vfx2023 / steps	11m 40s
macOS.1: Release / steps	59s
macOS.2: Debug / steps	1m 3s
macOS.3: static / steps	50s
macOS.4: pkgconfig=OFF, testing=OFF / steps	38s
macOS.5: macos-13 / steps	2m 30s
Windows.1: Release / steps	2m 34s
Windows.2: Debug / steps	1m 53s
Windows.3: static / steps	2m 26s
Windows.5: pkgconfig=OFF, testing=OFF / steps	1m 48s
Windows.6: vfx2022 / steps	1m 45s
	1h 26m 33s

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