Adds enterprise policy to always download PDF and sets download dir to
/dev/null
Moves policies to chromium.json and brave.json for clarity
Further cleanup of non-HTML loading path:
- sets downloadResponse when page load is aborted but response is
actually download
- sets firstResponse when first response finishes, but page doesn't
fully load
- logs that non-HTML pages skip all post-crawl behaviors in one place
- move page extra delay to separate awaitPageExtraDelay() function, applied for all pages (while post-load delay only applied to HTML pages)
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Co-authored-by: Tessa Walsh <tessa@bitarchivist.net>
