test: movement speed interpolation

[kuruk-mm]

Test!

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After the CI passes:

• This branch can be previewed at https://play.decentraland.zone/?renderer-branch=test/movement-interpolation
• Code coverage report: https://renderer-artifacts.decentraland.org/branch-coverage/test/movement-interpolation
• Benchmark report: https://renderer-artifacts.decentraland.org/branch-benchmark/test/movement-interpolation/index.html