community/chromium: fix GPU hardware acceleration issues

#13579 (closed) details the issues. Need to do more testing on the current package to see if this impacts normal to-disk installs with installed graphics drivers, but currently swiftshader is not working due to an outdated subpackage split. This MR should fix that (testing needed). This might also be the time to consider integrating at least the ANGLE subpackage into the main package due to the fact that ANGLE is used as the default WebGL backend in Chromium now (since v85 or so).