refactor(nns): Switch NNS Governance global state from static to thre… #22652

Job	Run time
Bazel Build All Config Check	0s
Bazel Build Fuzzers	5m 9s
Bazel Test All	45m 9s
Bazel Test macOS Intel	1h 15m 5s
Bazel Build Fuzzers AFL	4m 39s
Build IC	16m 30s
Cargo Build Release Linux	23s
Cargo Clippy Linux	23s
Python CI Tests	1m 52s
Build Determinism (//publish/binaries:upload, release, build-ic/release, false)	51s
Build Determinism (//publish/canisters:upload, canisters, build-ic/canisters, false)	40s
Build Determinism (//ic-os/guestos/envs/prod:upload_disk-img, guest-os/update-img, build-ic/icos/...	38s
Build Determinism (//ic-os/hostos/envs/prod:upload_update-img, host-os/update-img, build-ic/icos/...	58s
Build Determinism (//ic-os/setupos/envs/prod:upload_disk-img, setup-os/disk-img, build-ic/icos/se...	38s
	2h 32m 55s

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