feat: add v1 to shopping-merchant-datasources #14711

Job	Run time
root-pom	1m 20s
gapic-bom	1m 21s
owlbot-yaml	41s
gitignore_correctness	43s
generate-readme	52s
owlbot-py	48s
group_id_check_for_maps_libraries	5m 58s
package_name_check	41s
	12m 24s

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