[7.17] [ML] Functional tests - reduce job run time in date nanos and categorization tests (#123899)#123931

pheyos merged 2 commits intoelastic:7.17elastic/kibana:7.17from

kibanamachine:backport/7.17/pr-123899kibanamachine/kibana:backport/7.17/pr-123899Copy head branch name to clipboard