fix: Clean up attributes for traces and metrics #18749

Job	Run time
lint	3m 15s
enforcer	19m 30s
gapic-libraries-bom	17m 56s
bulk-filter	1m 2s
changes	3s
windows	2m 25s
generation-config-check	1m 33s
split-units (sdk-platform-java, 8)	4m 17s
split-units (sdk-platform-java, 21)	4m 37s
split-units (sdk-platform-java, 25)	4m 22s
split-units (sdk-platform-java, 17)	5m 19s
split-units (sdk-platform-java, 11)	4m 31s
units (8)	42m 18s
units (11)	43m 53s
units (17)	35m 8s
units (21)	33m 2s
units (25)	32m 52s
	4h 16m 3s

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