[mlir][spirv] Add resource limits into target environment

This commit adds two resource limits, max_compute_workgroup_size
and max_compute_workgroup_invocations as resource limits to
the target environment. They are not used at the current moment,
but they will affect the SPIR-V CodeGen. Adding for now to have
a proper target environment modelling.

Differential Revision: https://reviews.llvm.org/D73905