Expand tailored warnings to downloads page

Previously tailored warnings (cookie theft and suspicious archive)
are only shown on download bubble. This CL expands them to downloads
page.

Screenshots: https://drive.google.com/drive/folders/1pzEgNMJFPKdPf78PAXZTQwoRrrV5-Sue?usp=sharing

Bug: 329325809
Change-Id: I7aa2edb8c9f50abae1bb2bf4055658c29d234cbd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5366565


Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Xinghui Lu <xinghuilu@chromium.org>
Reviewed-by: Alex Gough <ajgo@chromium.org>
Reviewed-by: Lily Chen <chlily@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1280037}