fix(o11y): do not record error.type in successful runs #17234

Job	Run time
gitignore_correctness	1m 20s
package_name_check	1m 20s
owlbot-py	1m 30s
owlbot-yaml	1m 19s
root-pom	2m 0s
group_id_check_for_maps_libraries	8m 34s
gapic-bom	1m 43s
generate-readme	1m 22s
	19m 8s

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