Bump k8s.io/client-go from 0.28.2 to 0.31.3 in /wasp #20

Job	Run time
lib unit tests	11s
gotestloghelper unit tests	4s
testlistgenerator unit tests	10s
ecrimagefetcher unit tests	6s
ghlatestreleasechecker unit tests	7s
asciitable unit tests	24s
workflowresultparser unit tests	7s
	1m 9s

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