[spirv] Change spv.module custom assembly

[antiagainst]

Right now the arguments in spv.module is defined as

mlir/include/mlir/Dialect/SPIRV/SPIRVStructureOps.td

Lines 312 to 318 in 199f413

	let arguments = (ins
	SPV_AddressingModelAttr:$addressing_model,
	SPV_MemoryModelAttr:$memory_model,
	OptionalAttr<StrArrayAttr>:$capabilities,
	OptionalAttr<StrArrayAttr>:$extensions,
	OptionalAttr<StrArrayAttr>:$extended_instruction_sets
	);

Actually for $capabilities we should be able to use TypedArrayAttr<SPV_CapabilityAttr> as the kind but still parsing and printing the symbols for those capability numbers in custom assembly form.

Additionally for the custom assembly form, it would be nice to change to

`spv.module`
    spv-addressing-model spv-memory-model
    (`capabilities[` (spv-capability-string)+ `]`)?
    (`extensions[` (spv-extension-string)+ `]`)?
    (`ext-inst-sets[` (spv-extended-instruction-set-string)+ `]`)?
    region

This is easier to read and more consistent with the layout of SPIR-V itself.