lower `lapack` ops to `stablehlo`

the idea is to be able to write the algorithms of the `lapack` ops directly in `stablehlo`, so that we can then compile this ops on backends that do not have such LAPACK routine implemented.

besides, it should also give us free sharding and differentation if we support all appropiate stablehlo ops.

The issue names no files, tests, or entry points. Start by locating the existing LAPACK operation definitions and lowering paths, then identify how StableHLO operations are supported. Done means the LAPACK algorithms can be expressed directly in StableHLO so they can compile on backends without those LAPACK routines and support sharding and differentiation.

Written by the indexing model from the issue text.