Improve mlir-query tool by implementing `getBackwardSlice` and
`getForwardSlice` matchers. As an addition `SetQuery` also needed to be
added to enable custom configuration for each query. e.g: `inclusive`,
`omitUsesFromAbove`, `omitBlockArguments`.
Note: backwardSlice and forwardSlice algoritms are the same as the ones
in `mlir/lib/Analysis/SliceAnalysis.cpp`
Example of current matcher. The query was made to the file:
`mlir/test/mlir-query/complex-test.mlir`
```mlir
./mlir-query /home/dbudii/personal/llvm-project/mlir/test/mlir-query/complex-test.mlir -c "match getDefinitions(hasOpName(\"arith.add
f\"),2)"
Match #1:
/home/dbudii/personal/llvm-project/mlir/test/mlir-query/complex-test.mlir:5:8:
%0 = linalg.generic {indexing_maps = [#map, #map], iterator_types = ["parallel", "parallel"]} ins(%arg0 : tensor<5x5xf32>) outs(%arg1 : tensor<5x5xf32>) {
^
/home/dbudii/personal/llvm-project/mlir/test/mlir-query/complex-test.mlir:7:10: note: "root" binds here
%2 = arith.addf %in, %in : f32
^
Match #2:
/home/dbudii/personal/llvm-project/mlir/test/mlir-query/complex-test.mlir:10:16:
%collapsed = tensor.collapse_shape %0 [[0, 1]] : tensor<5x5xf32> into tensor<25xf32>
^
/home/dbudii/personal/llvm-project/mlir/test/mlir-query/complex-test.mlir:13:11:
%c2 = arith.constant 2 : index
^
/home/dbudii/personal/llvm-project/mlir/test/mlir-query/complex-test.mlir:14:18:
%extracted = tensor.extract %collapsed[%c2] : tensor<25xf32>
^
/home/dbudii/personal/llvm-project/mlir/test/mlir-query/complex-test.mlir:15:10: note: "root" binds here
%2 = arith.addf %extracted, %extracted : f32
^
2 matches.
```
