fuse `lapack.orgqr` + `stablehlo.dot_general` into `lapack.ormqr`

`lapack.ormqr` implements an algorithm for direct application of the Q matrix into another matrix given the PackedQR format (i.e. the result of `lapack.geqrf` op)

```mlir
%0 = enzymexla.lapack.orgqr %A, %tau : ...
%1 = stablehlo.dot_general %0, %X : ...
```

should be fused into

```mlir
%0 = stablehlo.transpose %X // we need X to be a matrix (if already is, it will be optimized away)
%1 = enzymexla.lapack.ormqr %0, %X : ...
```

Locate the transformation entry point that handles enzymexla.lapack.orgqr followed by stablehlo.dot_general, then trace how enzymexla.lapack.ormqr is represented. Use the MLIR examples in the issue as the expected pattern, including transpose handling, and verify that the original operation sequence is replaced by the fused form.

Written by the indexing model from the issue text.