Fix memory leak in MeshoptCompression

[OrigamiDev-Pete]

As discussed in https://forum.babylonjs.com/t/meshoptdecoder-memory-leak/49696

By using web workers to decode the buffer we can terminate the web worker which releases the wasm heap. In the future, memory.discard may be a better way of solving this, but this API is not available yet.

[bjsplat]

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To prevent this PR from going to the changelog marked it with the "skip changelog" label.

[bjsplat]

Snapshot stored with reference name:
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Test environment:
https://babylonsnapshots.z22.web.core.windows.net/refs/pull/14995/merge/index.html

To test a playground add it to the URL, for example:

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[bjsplat]

WebGL2 visualization test reporter:

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[bjsplat]

Visualization tests for WebGPU (Experimental)
Important - these might fail sporadically. This is an optional test.

https://babylonsnapshots.z22.web.core.windows.net/refs/pull/14995/merge/testResults/webgpuplaywright/index.html

[RaananW]

Waiting for @bghgary for a final approval

[bghgary]

LGTM