Added backend control plane implementation #1864

Job	Run time
Check codespell conformance	9s
Check src clang-format conformance	30s
Check Docker image (Release)	2m 33s
Check tests clang-format conformance	19s
Check Docker image (Debug)	2m 22s
Build Debug with g++-10	1m 54s
Build Debug with g++-12	2m 10s
Build Debug with clang-13	2m 11s
Build Debug with clang-16	2m 27s
Build Debug with clang-15	2m 28s
Build Debug with g++-11	2m 18s
Build Debug with g++-13	2m 11s
Build Release with g++-11	2m 35s
Build Release with g++-10	2m 20s
Build Debug with clang-18	2m 17s
Build Debug with g++-9	2m 25s
Build Debug with clang-17	2m 19s
Build Release with g++-9	2m 8s
Build Release with g++-12	2m 34s
Build Release with clang-13	2m 26s
Build Release with g++-13	2m 35s
Build Release with clang-14	2m 33s
Build Release with clang-17	2m 19s
Build Release with clang-15	2m 40s
Build Release with clang-16	2m 25s
Build Release with clang-18	2m 26s
Build Debug with clang-14	2m 13s
Codecov report upload	1s
	57m 48s

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