website: I3S example, disable texture compression

[felixpalmer]

For #9056

@ibgreen is it expected that compressed textures are not working? Without this "fix", I see errors like:

WebGL: INVALID_OPERATION: texSubImage2D: ArrayBufferView not big enough for requestUnderstand this warningAI
WebGL: INVALID_VALUE: texSubImage2D: width or height out of range

Repro https://felixpalmer.github.io/deck.gl/examples/arcgis

Change List

• {useCompressedTextures: false}

[coveralls]

coverage: 91.671%. remained the same
when pulling c28930b on felix/v9-website-i3s-fix
into 564d294 on master.

[ibgreen]

is it expected that compressed textures are not working?

No... this may be a side effect of the texture refactors. Should check that we have test cases for compressed textures in luma.gl.

@belom88 FYI