[mlir][spirv] Add support for SPV_ARM_graph extension - part 3 (#156845)

This is the third patch to add support for the `SPV_ARM_graph` SPIR-V
extension to MLIR’s SPIR-V dialect. The extension introduces a new
`Graph` abstraction for expressing dataflow computations over full
resources.

The part 3 implementation includes:

- ABI lowering support for graph entry points via
`LowerABIAttributesPass`.
- Tests covering ABI handling.

Graphs currently support only `SPV_ARM_tensors`, but are designed to
generalize to other resource types, such as images.

Spec: https://github.com/KhronosGroup/SPIRV-Registry/pull/346
RFC:
https://discourse.llvm.org/t/rfc-add-support-for-spv-arm-graph-extension-in-mlir-spir-v-dialect/86947

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Signed-off-by: Davide Grohmann <davide.grohmann@arm.com>
GitOrigin-RevId: 8036edb21dbedf79687613caef3d40aa5a50ddf2