Convert Lassen to new rebind methodology

[rdaly525]

This is referencing cdonovick/peak#102

Summary is that Peak classes in the future will be specified using a single BitVector family. This PEak class can then be "rebound" to other families. This removes the need for any family closure and will move all the magma special casing outside of the Peak class definition.

[rdaly525]

@rsetaluri could I get an update?

If I recall from Wednesday, the solution was to use a function similar to rebind in order to call magma.circuit.sequential on all the peak classes.

Any issues with this?

[rdaly525]

Closing as irrelevant