test: bump spec tests to v1.7.0-alpha.12 in eip-7688 branch

[ensi321]

Do the alpha.12 bump in eip-7688 branch.

[gemini-code-assist]

Code Review

This pull request updates the consensus spec version from v1.7.0-alpha.11 to v1.7.0-alpha.12 across comments and configuration files. It also introduces ProgressiveByteListType in SSZ generic type tests, skips several new failing tests related to Gloas and fast-confirmation rules, and ignores certain preset/config fields in the sync tests. Feedback is provided to improve type safety and readability in ensure-config-is-synced.test.ts by casting Object.keys(remotePreset) earlier in the chain to avoid redundant type assertions in the reduce callback.

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[gemini-code-assist]

We can improve type safety and readability by casting Object.keys(remotePreset) to (keyof BeaconPreset)[] at the start of the chain. This allows TypeScript to automatically infer the type of key as keyof BeaconPreset, eliminating the need for redundant type assertions (as keyof BeaconPreset) inside the reduce callback.

  const filteredRemotePreset: Partial<BeaconPreset> = (Object.keys(remotePreset) as (keyof BeaconPreset)[])
    .filter((key) => !ignoredRemotePresetFields.includes(key))
    .reduce(
      (acc, key) => {
        acc[key] = remotePreset[key];
        return acc;
      },
      {} as Partial<BeaconPreset>
    );