chore: Rename otel classes #17449

Job	Run time
root-pom	1m 51s
owlbot-yaml	1m 6s
group_id_check_for_maps_libraries	8m 19s
package_name_check	1m 16s
gapic-bom	1m 57s
generate-readme	1m 7s
owlbot-py	1m 11s
gitignore_correctness	1m 2s
	17m 49s

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