Use official Chrome on all internal builders.
Use official Chrome on all internal builders.

This CL makes all internal builders use the official Chrome. This adds
official use flags to internal incremental, paladin pfq, and pre-cq builders,
but leaves chromeos_official=False so that they aren't marked as
official builds in the version number, and leaves highdpi enabled so that
they can all share prebuilts.

BUG=chromium:222377
CQ-DEPEND=CL:50058, CL:50485, CL:50834, CL:50923
TEST=Unittests, trybot runs.
TEST=Verify above changes are the only change via JSON diff.
Change-Id: Ie2bad6f363fd408128f4c1b90a2ee20a6d661047
Reviewed-on: https://gerrit.chromium.org/gerrit/50066
Tested-by: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>
Reviewed-by: Chris Sosa <959d3d631fb6f17f1b07f751372041a1edb210d1@chromium.org>
Reviewed-by: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>
Commit-Queue: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>

bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite,chadversary/chromiumos.chromite,chadversary/chromiumos.chromite