[Feat] support setting opacity of fill and stroke independently in H3 hexagon layer

Target Use Case

We are not able to customize H3 layer to apply opacity to stroke and fill independently. Because H3 layer renders column layer which is not a composite layer. Opacity is applied as a uniform.

H3 layer - opacity is applied to both stroke and fill

With the geojson layer. We can apply opacity to the stroke layer independently by passing _subLayerProps

        _subLayerProps: {
          ...(featureTypes.polygon ? {'polygons-stroke': {opacity: 0.5}} : {}),
          ...(featureTypes.line ? {linestrings: {opacity: 0.5}} : {})
        }

Proposal

Honestly. I am not sure what would be a good solution here that doesn't affect performance. If we renders a composite layer just for the stroke then we will be passing the same buffer twice. If we use the hi definition prop which renders a geojson layer instead, it also hurts performance.