Horizontally fuse elementwise operators with more then 2 inputs acros… #21686

Job	Run time
cancel	4s
Check if image exists in registry	5s
licensing	3m 10s
linux (ubuntu-20.04, debug)	12m 53s
linux (ubuntu-20.04, release)	9m 58s
linux (ubuntu-20.04, codecov)	12m 52s
linux-fpga (ubuntu-20.04, debug)	10m 42s
pyflakes	5m 39s
Build image	0s
Build SLES image	0s
tidy	12m 42s
format	4m 59s
cppcheck	10m 34s
sles	11m 27s
	1h 35m 5s

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