chore: Rename otel classes #17440

Job	Run time
group_id_check_for_maps_libraries	10m 41s
owlbot-yaml	1m 3s
package_name_check	1m 0s
gapic-bom	1m 48s
owlbot-py	1m 24s
gitignore_correctness	1m 16s
generate-readme	1m 18s
root-pom	1m 57s
	20m 27s

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