[mlir][vector] Add n-d deinterleave lowering (#94237)
This patch implements the lowering for vector
deinterleave for vector of n-dimensions. Process
involves unrolling the n-d vector to a series
of one-dimensional vectors. The deinterleave
operation is then used on these vectors.
From:
```
%0, %1 = vector.deinterleave %a : vector<2x8xi8> -> vector<2x4xi8>
```
To:
```
%cst = arith.constant dense<0> : vector<2x4xi32>
%0 = vector.extract %arg0[0] : vector<8xi32> from vector<2x8xi32>
%res1, %res2 = vector.deinterleave %0 : vector<8xi32> -> vector<4xi32>
%1 = vector.insert %res1, %cst [0] : vector<4xi32> into vector<2x4xi32>
%2 = vector.insert %res2, %cst [0] : vector<4xi32> into vector<2x4xi32>
%3 = vector.extract %arg0[1] : vector<8xi32> from vector<2x8xi32>
%res1_0, %res2_1 = vector.deinterleave %3 : vector<8xi32> -> vector<4xi32>
%4 = vector.insert %res1_0, %1 [1] : vector<4xi32> into vector<2x4xi32>
%5 = vector.insert %res2_1, %2 [1] : vector<4xi32> into vector<2x4xi32>
...etc.
```
b87a80d4eb