2237a18f25
This adds BE support for the [`SPV_INTEL_kernel_attributes`](https://github.khronos.org/SPIRV-Registry/extensions/INTEL/SPV_INTEL_kernel_attributes.html) extension. The extension is necessary to encode the rather useful `max_work_group_size` kernel attribute, via `OpExecutionMode MaxWorkgroupSizeINTEL`, which is the only Execution Mode added by the extension that this patch adds full processing for. Future patches will add the other Execution Modes and Capabilities. The test is adapted from the equivalent Translator test; it depends on #165815.