Move the type information from the names into metadata.
Move the type information from the names into metadata.

This metadata was originally encoded in the name as there was nowhere
else to store it. Now that VPR has metadata support, we should store the
information there.

Fixes #561.

Signed-off-by: Tim 'mithro' Ansell <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@mith.ro>

SymbiFlow/python-symbiflow-v2x,SymbiFlow/python-symbiflow-v2x