ConvInteger: fix parsing for x_zero_point and w_zero_point (#3763) #22328

Job	Run time
Check if image exists in registry	8s
cancel	3s
pyflakes	4m 54s
licensing	4m 36s
linux (ubuntu-20.04, debug)	4h 20m 7s
linux-fpga (ubuntu-20.04, debug)	4h 9m 52s
linux (ubuntu-20.04, release)	3h 16m 30s
linux (ubuntu-20.04, codecov)	3h 18m 35s
Build image	0s
Build SLES image	0s
tidy	1h 32m 25s
format	5m 12s
cppcheck	57m 51s
sles	36m 11s
	18h 26m 24s

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