docker/CI: remove Fedora images #3422

Job	Run time
ubuntu-20.04 (non-mavsdk_server, non-superbuild)	4m 38s
Ubuntu/Debian packaging (Ubuntu 20.04)	9m 52s
ubuntu-20.04 (package, non-mavsdk_server)	7m 40s
coverage (ubuntu-20.04)	5m 25s
ubuntu-22.04 (package, non-mavsdk_server)	7m 12s
ubuntu-22.04 (check style and docs)	8m 45s
ubuntu-20.04 (mavsdk, hunter)	9m 12s
ubuntu-22.04 (proto check)	28m 13s
ubuntu-20.04 (mavsdk_server, superbuild)	40m 38s
alpine 3.16.0 (musl)	1h 4m 50s
ubuntu-22.04 (mavsdk_server, superbuild)	39m 36s
android-arm	2m 4s
android-arm64	1s
android-x86	48s
linux-armv6	5m 39s
android-x86_64	2m 1s
linux-armv7	5m 38s
linux-armv6-musl	45m 14s
linux-arm64	5m 35s
linux-armv7l-musl	43m 32s
ios	43m 27s
linux-arm64-musl	48m 14s
macOS	28m 27s
ios_simulator	43m 46s
macOS-framework	43m 33s
Windows	1h 51m 52s
iOS XCFramework	1m 8s
	10h 57m 0s

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