Fix libraries in random blocks fail to produce sequences

[yeonkim1213]

Does this PR close any open issues?

Closes #784

Give a longer description of what this PR addresses and why it's needed

Fix libraries in random blocks fail to produce sequences

Provide pictures/videos of the behavior before and after these changes (optional)

Before

After

"sequence": {
    "order": "fixed",
    "components": [
      "introduction",
      "$mic-check.co.audioTest",
      {
        "id": "test",
        "order": "random",
        "components": [
          {
            "id": "critiquePart",
            "components": [
              "critiqueCalvi1",
              "critiqueCalvi2",
              "critiqueUntimelyDeath",
              "critiqueWealth"
            ],
            "order": "random"
          },
          "drawingTraining",
          {
            "id": "drawingPart",
            "components": [
              "drawingTree",
              "drawingNetwork",
              "drawingBpm",
              "drawingRanking",
              "drawing100m"
            ],
            "order": "random"
          },
          "$mini-vlat.se.full"
        ]
      }
    ]
  }

when config.json looks like the one above, the random sequence is generated correctly, and the mini-VLAT is also generated in a latin square sequence.

minivlatTest.mp4

Are there any additional TODOs before this PR is ready to go?

No

[github-actions]

A preview of 8b32a1c is uploaded and can be seen here:

✨ https://revisit.dev/study/PR828 ✨

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