This contains theorems responsible for turning both Bool and BitVec goals into the
x = true normal form (where x consists of only Bool and BitVec) expected by bv_decide.
theorem
Std.Tactic.BVDecide.Normalize.BitVec.sshiftRight_eq'
{w w✝ : Nat}
{y : BitVec w✝}
(x : BitVec w)
: