Split Ftp plugin into Ftp and FtpServer #3323

Job	Run time
alpine 3.16.0 (musl)	13m 50s
Ubuntu/Debian packaging (Ubuntu 20.04)	8m 1s
coverage (ubuntu-20.04)	5m 11s
ubuntu-20.04 (package, non-mavsdk_server)	6m 37s
ubuntu-22.04 (package, non-mavsdk_server)	7m 1s
android-arm	6m 24s
android-arm64	6m 29s
android-x86	6m 24s
android-x86_64	6m 19s
linux-armv6	4m 41s
linux-armv7	4m 38s
linux-arm64	4m 37s
linux-armv6-musl	12m 21s
linux-armv7l-musl	12m 36s
linux-arm64-musl	13m 17s
ios	9m 20s
ios_simulator	8m 45s
macOS	13m 50s
macOS-framework	13m 53s
ubuntu-20.04 (mavsdk, hunter)	4m 54s
ubuntu-22.04 (style and proto check)	1m 46s
ubuntu-20.04 (non-mavsdk_server, non-superbuild)	5m 29s
ubuntu-20.04 (mavsdk_server, superbuild)	13m 5s
ubuntu-22.04 (mavsdk_server, superbuild)	14m 14s
Windows	15m 25s
iOS XCFramework	56s
	3h 40m 3s

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