Parent task to keep track of all vector basic bit-manipulation instructions from the Zvbb extension.

If you are interested in certain sub-tasks, feel free to assign to yourself.
If there are some reasons we should not implement, please go ahead and close with short motivation.

Zvbb extension is a superset of the Zvkb extension.

1. Zvbb instructions:

  vandn.[vv,vx] Vector And-Not
  vbrev.v Vector Reverse Bits in Elements
  vbrev8.v Vector Reverse Bits in Bytes
  vrev8.v Vector Reverse Bytes
  vclz.v Vector Count Leading Zeros
  vctz.v Vector Count Trailing Zeros
  vcpop.v Vector Population Count
  vrol.[vv,vx] Vector Rotate Left
  vror.[vv,vx,vi] Vector Rotate Right
  vwsll.[vv,vx,vi] Vector Widening Shift Left Logical

2. Zvkb instructions:

  vandn.[vv,vx] Vector And-Not
  vbrev8.v Vector Reverse Bits in Bytes
  vrev8.v Vector Reverse Bytes
  vrol.[vv,vx] Vector Rotate Left
  vror.[vv,vx,vi] Vector Rotate Right