Some targets have a specific calling convention that should be used for
generated calls to runtime functions.

Pass that down and use it.

Signed-off-by: Nick Sarnie <nick.sarnie@intel.com>

Reverts llvm/llvm-project#165873

The revert is triggered by a failing integration test on a couple of
buildbots.

This PR extends the `gpu.subgroup_mma_*` ops to support fp64 type.
The extension requires special handling during the lowering to `nvvm`
due to the return type for load ops for fragment a and b (they return a
scalar instead of a struct).

This enables changing the location of a block argument. Follows the
approach for updating type of block arg.

`set_op_layout_attr` and `set_desc_layout` transform ops wrap
`xegpu.layout` in an `xegpu.slice` attribute if `slice_dims` argument is
set.

This commit enables the direct import of debug records by default and
fixes issues with two edge cases:
- Detect early on if the address operand is an argument list (calling
getAddress() for argument lists asserts)
- Use getAddress() to check if the address operand is null, which means
the address operand is an empty metadata node, which currently is not
supported.
- Add support for debug label records.

This is a follow-up to:
https://github.com/llvm/llvm-project/pull/167812