Renamed 'symbol' field in skipped production to 'def' #1950

Job	Run time
test-linux	6m 53s
builds	10m 13s
tests (windows-latest)	7m 9s
tests (macos-latest)	5m 9s
tests (buildjet-4vcpu-ubuntu-2204-arm)	5m 37s
	35m 1s

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