GeometryBufferRenderer: Use bone texture if supported

[Popov72]

See https://forum.babylonjs.com/t/error-on-new-ssrrenderingpipeline/41812/16

We used uniforms even when bone texture was supported because of the velocity target (which only supports passing previous bone data through uniforms). The PR let use bone texture for the model while still using uniforms for previous bone data.

PG to test: https://playground.babylonjs.com/#E5YGEL#59

You can see with Spector that with the current code, the bone matrices are passed through uniforms, whereas the shader uses the bone texture when the PR is applied.

[bjsplat]

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[bjsplat]

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