Implement SoV data struct #7793

Job	Run time
e2e_pre_etna	11m 29s
Unit (macos-12)	9m 8s
Unit (ubuntu-20.04)	6m 54s
e2e_existing_network	4m 26s
e2e_post_etna	11m 9s
Unit (ubuntu-22.04)	7m 5s
Fuzz	13m 28s
Unit (windows-2022)	11m 55s
Lint	3m 18s
Unit (custom-arm64-focal)	12m 57s
Upgrade	3m 15s
Unit (custom-arm64-jammy)	11m 53s
Protobuf Lint	6s
Up-to-date protobuf	21s
Up-to-date mocks	1m 58s
Up-to-date go.mod and go.sum	12s
Build Antithesis avalanchego images	8m 52s
Build Antithesis xsvm images	11m 48s
Image build	10m 37s
	2h 20m 51s

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