installer: start downloading Chromium archives from our CDN (#3361)
installer: start downloading Chromium archives from our CDN (#3361)

This starts downloading newer Chromium archives from our CDN, but
retains old endpoint for older Chromium revisions.

This backwards compatibility might help later on to implement
a browser bisecting tool.

References #3259

microsoft/playwright,microsoft/playwright,microsoft/playwright,microsoft/playwright,microsoft/playwright,microsoft/playwright,microsoft/playwright,microsoft/playwright,microsoft/playwright