Update known issues: Graphics cards regressions with Wayland (Tails 5.8+)

Next steps

Update our doc, in particular https://tails.boum.org/support/known_issues/graphics/:

• scrap most of the per-device or per-family info we have on that page: at best, we don't know if it's still valid with Wayland.
• check with users if the workarounds we have documented on https://tails.boum.org/news/version_5.8/#graphics are still necessary in 5.9+ and still work → in the end I managed to update the doc without having to do that.
• document workarounds that are still worth trying

Problem

Listed in https://tails.boum.org/news/version_5.8/#graphics.

• Some were solved by #18467 (closed).
• Some others could be solved in Tails 6.0 based on Debian Bookworm and its new Mesa stack.
• Some others might never get fixed.

Workaround

These graphics card probably don't work as good on Wayland as they used to work on X.Org.

For some graphics cards, we have workarounds documented on https://tails.boum.org/news/version_5.8/#graphics.

We hope that this gets fixed in Tails 6.0.