Rename Plugin to `AttentionAndDistributedPacking` #252

Job	Run time
sample-config	9s
lint (framework)	3m 33s
lint (accelerated-peft)	4m 31s
lint (fused-ops-and-kernels)	5m 54s
lint (attention-and-distributed-packing)	3m 26s
	17m 33s

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