Fixed time of day in worlds ignored

[nearnshaw]

🛠️ Build version:

All versions, was never implemented

📔 Issue Description:

In the Web Explorer we had a features that was developed only for Worlds (for now), which lets you ignore the default day/night cycle and set a specific fixed skybox time of day. For example if you want your scene to always be nighttime, or the hour of the sunset.

This feature was never developed in explorer alpha.

This is needed for example in the tutorial scene, where the scene looks much better with day light than at night, but today players will find themselves with whatever time of day the default cycle shows them.

More info in this feature in the docs:
https://docs.decentraland.org/creator/worlds/about/#world-defaults

STR:

1. Open this world, and check that the time of day cycles.
   decentraland://?realm=nicoe.dcl.eth

According to its definition on the scene.json, it should always be midnight.

 "worldConfiguration": {
    "name": "nicoe.dcl.eth",
    "skyboxConfig": {
      "fixedTime": 0
    }
  }

2. Open the same world on the web explorer, and note how it's always night

✔️ Expected Result:

The scene should always be with the midnight sky.

❌ Actual Result with evidence:

The scene cycles through the normal day/night cycle.

➗ Repro Index:

100%

🖥️ Operative system and additional Notes:

Mac
(surely happens on all OS)