camera: support multiple cameras within one instance #4280

Job	Run time
ubuntu-20.04 (non-mavsdk_server, hunter)	4m 54s
ubuntu-20.04 (mavsdk_server, superbuild)	14m 8s
ubuntu-22.04 (non-mavsdk_server, hunter)	4m 22s
ubuntu-22.04 (mavsdk_server, superbuild)	39m 22s
Coverage (ubuntu-22.04)	7m 4s
alpine 3.19.0 (musl)	12m 38s
ubuntu-24.04 (non-mavsdk_server, hunter)	4m 36s
ubuntu-24.04 (mavsdk_server, superbuild)	12m 23s
ubuntu-24.04 (mavsdk_server, superbuild)	12m 28s
ubuntu-20.04 (package, non-mavsdk_server)	8m 21s
ubuntu-24.04 (mavsdk_server, superbuild)	13m 17s
android-arm	6m 36s
linux-armv6	5m 58s
ubuntu-22.04 (package, non-mavsdk_server)	6m 28s
android-arm64	6m 50s
linux-armv7	5m 47s
ubuntu-24.04 (package, non-mavsdk_server)	6m 55s
android-x86	6m 53s
linux-armv6-musl	38m 14s
linux-arm64	7m 8s
android-x86_64	6m 24s
linux-arm64-lts	5m 34s
linux-armv7l-musl	38m 38s
ios	1h 7m 16s
linux-arm64-musl	42m 31s
ios_simulator_x64	7m 50s
macOS x64	59m 1s
ubuntu-24.04 (style and proto check)	2m 1s
ios_simulator_arm64	1h 7m 12s
macOS arm64	23m 19s
ubuntu-20.04 (non-mavsdk_server, non-superbuild)	7m 55s
macOS framework x64	44m 15s
Windows	1h 16m 33s
ubuntu-22.04 (non-mavsdk_server, non-superbuild)	6m 44s
macOS framework arm64	26m 11s
ubuntu-24.04 (non-mavsdk_server, non-superbuild)	8m 29s
iOS XCFramework	0s
	11h 54m 15s

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