Split Ftp plugin into Ftp and FtpServer #3435

Job	Run time
coverage (ubuntu-20.04)	6m 14s
ubuntu-20.04 (package, non-mavsdk_server)	8m 18s
alpine 3.16.0 (musl)	13m 38s
Ubuntu/Debian packaging (Ubuntu 20.04)	9m 30s
ubuntu-22.04 (package, non-mavsdk_server)	7m 55s
android-arm	6m 32s
linux-armv6	5m 57s
android-arm64	6m 44s
linux-armv6-musl	12m 3s
ios	10m 25s
linux-armv7	5m 50s
android-x86	6m 21s
linux-armv7l-musl	15m 9s
ios_simulator	5m 48s
android-x86_64	6m 20s
linux-arm64-musl	13m 15s
linux-arm64	4m 59s
macOS	13m 52s
ubuntu-20.04 (mavsdk, hunter)	4m 45s
ubuntu-22.04 (style and proto check)	1m 27s
macOS-framework	13m 15s
ubuntu-20.04 (non-mavsdk_server, non-superbuild)	5m 55s
ubuntu-20.04 (mavsdk_server, superbuild)	11m 25s
ubuntu-22.04 (mavsdk_server, superbuild)	11m 40s
Windows	17m 59s
iOS XCFramework	2m 37s
	3h 47m 53s

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