[AMDGPU]: Fix type signatures for wmma intrinsics, NFC (#80087)

Make the wmma intrinsic type signatures to be canonical. We need
a type signature as long as the type is not fixed. However, when an
argument's type matches a previous argument's type, we do not need the
signature for this argument.

 This patch fixes three general cases:
  1. add missing signatures
  2. remove signatures for matching arguments
3. reorer the signatures -- return type signature should always appear
first