Previously VortexBundle was being instantiated using the parameters of
the TileLink bundle from VortexTile. This results in tight coupling
between Vortex interface parameters and downstream TileLink parameters.
This change adds a standalone Bundle used by the VortexCore wrapper
and is independently instantiated from the TL params, i.e. different
source widths. Ideally we want to move away from using TL-like
structures for VortexBundle and handling adapter logic completely
outside the core blackbox.
This fixes sourceId collision that occurs when naively re-using tag bit
of a Vortex dmem request as TL source, which happens because Vortex core
does not allocate a new LSU entry for writes.
`VortexSourceGen` module acts as a Vortax tag <-> new TL source ID
converter, where it allocates a new ID for every new Vortex request, and
restores its original tag bits from the metadata embedded in the
SourceGenerator module.
TODO:
- Decouple sourceWidth of downstream TL nodes from Vortex's tag bit
width; they are set to be the same for convenience as of now
- Apply this to imem requests as well
