[CIR] Track size_t and int size with module attributes

[AdUhTkJm]

To give LoweringPrepare type information from CIRGenTypeCache, this PR adds two attributes to ModuleOp:

module attributes {
  cir.int_size = #cir.int_size<32>,
  cir.size_type_size = #cir.size_type_size<64>,
  ...
} {}

The CIRDataLayout class is also extended to have getPtrDiffTy and so on.

Some tests that only expects cir.lang and cir.sob are also changed to take this into account.