Define custom op for grid points generator of single level feature ma… #2063

Job	Run time
build-llm-demo (bpe) / linux-job	30m 34s
build-llm-demo (tiktoken) / linux-job	32m 23s
run-emulator	7m 22s
upload-artifacts	1m 28s
test-llama-app (bpe) / mobile-job (android)	4m 31s
	1h 16m 18s

Provide feedback