Tile channels for group norm and also fuse output reshapes in mlir #22187

Job	Run time
licensing	3m 24s
Check if image exists in registry	8s
cancel	3s
linux (ubuntu-20.04, debug)	2h 37m 16s
linux (ubuntu-20.04, release)	1h 46m 18s
linux-fpga (ubuntu-20.04, debug)	2h 33m 22s
misspell	20s
linux (ubuntu-20.04, codecov)	1h 41m 47s
pyflakes	3m 33s
Build image	0s
Build SLES image	0s
cppcheck	1h 0m 38s
format	5m 46s
tidy	7m 45s
sles	38m 34s
	10h 38m 54s

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