Fuse multiple outputs for pointwise and reductions #22189

Job	Run time
cancel	2s
Check if image exists in registry	7s
licensing	5m 47s
linux (ubuntu-20.04, debug)	9m 6s
linux (ubuntu-20.04, release)	11m 35s
linux (ubuntu-20.04, codecov)	11m 35s
linux-fpga (ubuntu-20.04, debug)	11m 11s
pyflakes	6m 20s
misspell	14s
Build image	0s
Build SLES image	0s
tidy	1h 13m 3s
cppcheck	1h 7m 39s
format	5m 43s
sles	5m 45s
	3h 28m 7s

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