Split Ftp plugin into Ftp and FtpServer #3466

Job	Run time
Ubuntu/Debian packaging (Ubuntu 20.04)	8m 23s
alpine 3.16.0 (musl)	17m 40s
coverage (ubuntu-20.04)	6m 43s
ubuntu-20.04 (package, non-mavsdk_server)	9m 22s
ubuntu-22.04 (package, non-mavsdk_server)	9m 56s
android-arm	9m 58s
linux-armv6	7m 25s
android-arm64	6m 58s
linux-armv6-musl	17m 52s
linux-armv7	6m 25s
android-x86	7m 7s
linux-armv7l-musl	18m 56s
linux-arm64	6m 40s
android-x86_64	9m 34s
linux-arm64-musl	18m 26s
ios	8m 12s
ios_simulator	13m 0s
ubuntu-20.04 (mavsdk, hunter)	7m 6s
macOS	10m 15s
ubuntu-20.04 (non-mavsdk_server, non-superbuild)	6m 14s
ubuntu-22.04 (style and proto check)	1m 27s
macOS-framework	17m 32s
ubuntu-20.04 (mavsdk_server, superbuild, RelWithDebInfo)	12m 14s
Windows	13m 59s
ubuntu-20.04 (mavsdk_server, superbuild, Debug)	12m 32s
ubuntu-22.04 (mavsdk_server, superbuild, RelWithDebInfo)	11m 54s
ubuntu-22.04 (mavsdk_server, superbuild, Debug)	12m 3s
iOS XCFramework	1m 2s
	4h 48m 55s

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