chore: Rename otel classes #17450

Job	Run time
package_name_check	1m 3s
group_id_check_for_maps_libraries	8m 20s
generate-readme	1m 15s
root-pom	1m 46s
owlbot-yaml	1m 11s
gitignore_correctness	1m 14s
gapic-bom	1m 55s
owlbot-py	1m 36s
	18m 20s

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