feat: add org.json:json to third-party-dependencies pom #12571

Job	Run time
build(21) except self-service clients	13m 18s
lint	57s
build(8) for showcase	4m 48s
build (17)	13m 59s
build(25) except self-service clients	12m 49s
build(8) for gapic-generator-java	11m 7s
build(8) except for gapic-generator-java	4m 36s
build (11)	14m 34s
compatibility	1m 49s
unmanaged_dependency_check	6m 18s
gapic-generator-java-bom	2m 38s
showcase (17)	10m 22s
showcase-clirr	4m 5s
dependency_analyzer_unit_test	21s
showcase (25)	10m 38s
showcase (11)	10m 41s
showcase (21)	10m 30s
	2h 13m 30s

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