fix(nns): Rollback neurons migration (#3948) #692

Job	Run time
Bazel System Test Nightly	37m 13s
Bazel System Test Staging	16m 18s
Bazel System Test Hotfix	23m 16s
Dependency Scan for Release	4m 7s
Setting up guest os qualification pipeline	8s
CI Main / Bazel Build Fuzzers	2m 7s
CI Main / Bazel Test All	22m 29s
CI Main / Bazel Build Fuzzers AFL	2m 7s
CI Main / Bazel Test macOS Intel	7m 21s
CI Main / Build IC	9m 11s
CI Main / Cargo Build Release Linux	28s
CI Main / Python CI Tests	1m 51s
CI Main / Cargo Clippy Linux	28s
Qualifying 5ee8dcf34f26c12defcff51c2f5737214611bccc -> 4467b639a0d18a7118afc737e2a872be513d475b	1h 30m 16s
CI Main / Build Determinism (//publish/binaries:upload, release, build-ic/release, false)	26s
CI Main / Build Determinism (//publish/canisters:upload, canisters, build-ic/canisters, false)	26s
CI Main / Build Determinism (//ic-os/guestos/envs/prod:upload_disk-img, guest-os/update-img, build-ic/icos/...	26s
CI Main / Build Determinism (//ic-os/hostos/envs/prod:upload_update-img, host-os/update-img, build-ic/icos/...	27s
CI Main / Build Determinism (//ic-os/setupos/envs/prod:upload_disk-img, setup-os/disk-img, build-ic/icos/se...	26s
	3h 39m 31s

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