Split Ftp plugin into Ftp and FtpServer #3487

Job	Run time
Ubuntu/Debian packaging (Ubuntu 20.04)	8m 14s
alpine 3.16.0 (musl)	1h 18m 21s
coverage (ubuntu-20.04)	5m 11s
ubuntu-20.04 (package, non-mavsdk_server)	8m 9s
ubuntu-22.04 (package, non-mavsdk_server)	7m 3s
android-arm	7m 3s
linux-armv6	6m 12s
linux-armv6-musl	20m 28s
android-arm64	7m 17s
linux-armv7	6m 33s
linux-armv7l-musl	15m 25s
android-x86	8m 17s
linux-arm64	6m 35s
linux-arm64-musl	16m 10s
ios	16m 24s
android-x86_64	9m 13s
ios_simulator	9m 12s
macOS	17m 31s
ubuntu-20.04 (mavsdk, hunter)	5m 59s
ubuntu-20.04 (non-mavsdk_server, non-superbuild)	8m 8s
ubuntu-22.04 (style and proto check)	1m 29s
ubuntu-20.04 (mavsdk_server, superbuild)	19m 45s
macOS-framework	11m 6s
ubuntu-20.04 (mavsdk_server, superbuild)	1h 13m 3s
ubuntu-22.04 (mavsdk_server, superbuild)	17m 18s
Windows	15m 13s
ubuntu-22.04 (mavsdk_server, superbuild)	1h 11m 44s
iOS XCFramework	58s
	7h 58m 1s

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