feat(storage): add checksum validation in the json read channel #19311

Job	Run time
generate-readme	1m 13s
package_name_check	1m 9s
group_id_check_for_maps_libraries	7m 32s
gapic-bom	1m 39s
gitignore_correctness	1m 10s
owlbot-yaml	1m 12s
owlbot-py	1m 21s
root-pom	1m 51s
	17m 7s

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