Revert stencil mask skipping optimization

[endanke]

Reverts: #11542 and #11546

Fixes an issue which was originally reported in gl-native, however it was also reproducible in gl-js and seems to be caused by the optimization above.

The exact root cause of the issue is still not fully clear, but it seems to happen with styles that have a large amount of line layers. It appears the flickering happens when the 256 limit of the stencil IDs is reached, so most likely the stencils are not correctly rendered with the optimization after clearing.

Launch Checklist

• briefly describe the changes in this PR
• include before/after visuals or gifs if this PR includes visual changes
• write tests for all new functionality
• document any changes to public APIs
• post benchmark scores
• manually test the debug page
• tagged @mapbox/map-design-team @mapbox/static-apis if this PR includes style spec API or visual changes
• tagged @mapbox/gl-native if this PR includes shader changes or needs a native port
• apply changelog label ('bug', 'feature', 'docs', etc) or use the label 'skip changelog'
• add an entry inside this element for inclusion in the mapbox-gl-js changelog: <changelog>Fixes an issue which causes line layers to flicker occasionally</changelog>

[fr-an-k]

I'm still having this or similar issue: #12024 and a newly introduced bug, possibly because of this fix: #12023