Instead of removing/hiding page-touching tools entirely when dealing
with imported Lighthouse reports or non-fresh traces, keep them declared.
When AIDA attempts to invoke them, early exit inside their handlers
with a concise error message indicating they cannot be used.

This also removes the security warning prepended to the prompt
preambles, simplifying the initial query.

Fixed: 513711812
Change-Id: Ia680e27131d34a6ec97ca9b6bc0e45145af0a27e
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/7912246
Auto-Submit: Jack Franklin <jacktfranklin@chromium.org>
Commit-Queue: Jack Franklin <jacktfranklin@chromium.org>
Reviewed-by: Paul Irish <paulirish@chromium.org>