rosdep key rendering doesn't support wildcards in specific pages

[tfoote]

When you visit a specifc rosdep like https://index.ros.org/d/python3-pykdl/ it's supports Focal and newer using the wildcard syntax. But the rendering shows no matches for Ubuntu.

It needs logic to render those not blacklisted as present.

But when doing that we should reduce our list back down to supported platforms otherwise it will fill in all the old ones as "matching".

[peci1]

Similarly for libfcl-dev:

ubuntu:
    '*': [libfcl-dev]

But https://index.ros.org/d/libfcl-dev/ shows no versions for Ubuntu.