camera: support multiple cameras within one instance #4190

Job	Run time
alpine 3.19.0 (musl)	25s
coverage (ubuntu-20.04)	5s
Ubuntu/Debian packaging (Ubuntu 20.04)	6s
ubuntu-20.04 (package, non-mavsdk_server)	4s
ubuntu-22.04 (package, non-mavsdk_server)	5s
android-arm	4s
linux-armv6	4s
ubuntu-24.04 (package, non-mavsdk_server)	4s
android-arm64	1s
linux-armv6-musl	4s
linux-armv7	6s
android-x86	6s
linux-armv7l-musl	4s
linux-arm64	4s
linux-arm64-musl	4s
android-x86_64	7s
ios	27s
linux-arm64-lts	4s
ios_simulator_x64	13s
macOS x64	1s
ios_simulator_arm64	28s
ubuntu-20.04 (mavsdk, hunter)	3s
macOS arm64	10s
ubuntu-20.04 (non-mavsdk_server, non-superbuild)	4s
ubuntu-24.04 (style and proto check)	5s
macOS framework x64	1s
ubuntu-20.04 (mavsdk_server, superbuild)	4s
macOS framework arm64	10s
Windows	11s
ubuntu-22.04 (mavsdk_server, superbuild)	6s
ubuntu-24.04 (mavsdk_server, superbuild)	6s
ubuntu-24.04 (mavsdk_server, superbuild)	3s
ubuntu-24.04 (mavsdk_server, superbuild)	3s
iOS XCFramework	0s
	3m 52s

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