feat(sns): Automatically advance SNS target version upon opt-in #21352

Job	Run time
Bazel Build Fuzzers	5m 32s
Bazel Test All	14m 8s
Bazel Build Fuzzers AFL	4m 23s
Bazel Test macOS Intel	0s
Python CI Tests	2m 36s
Bazel Build All Config Check	0s
Build IC	19m 46s
Cargo Build Release Linux	10m 2s
Cargo Clippy Linux	3m 56s
Build Determinism (//publish/binaries:upload, release, build-ic/release, false)	14s
Build Determinism (//publish/canisters:upload, canisters, build-ic/canisters, false)	15s
Build Determinism (//ic-os/guestos/envs/prod:upload_disk-img, guest-os/update-img, build-ic/icos/...	16s
Build Determinism (//ic-os/hostos/envs/prod:upload_update-img, host-os/update-img, build-ic/icos/...	16s
Build Determinism (//ic-os/setupos/envs/prod:upload_disk-img, setup-os/disk-img, build-ic/icos/se...	14s
	1h 1m 38s

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