Configurable max CTAs and NVLS usage for CUDA IPC communicator #4227
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TM_COMM_MAX_CTAScontrols the max number of CTAs used in non-LL collectivesTM_COMM_NVLS_ENABLEcontrols whether NVLS can be used (to avoid malfunctioning NVLS)TM_COMM_COPY_THRESHOLDsend-size threshold to switch to copy engine based all-gather (10-15% boost for large send size because of reduced protocol cost)