chore: migrate java-shared-config to monorepo #21792

Job	Run time
bulk-filter	1m 2s
generation-config-check	1m 14s
enforcer	20m 8s
lint	2m 38s
changes	30s
units (25)	40m 24s
units (21)	39m 33s
gapic-libraries-bom	19m 8s
units (26)	40m 41s
units (11)	42m 2s
windows	1m 9s
units (8)	41m 19s
units (17)	42m 28s
split-clirr (java-shared-config)	1m 55s
split-units (java-shared-config, 8)	2m 21s
split-units (java-shared-config, 25)	1m 59s
split-units (java-shared-config, 17)	2m 3s
split-units (java-shared-config, 21)	1m 56s
split-units (java-shared-config, 11)	2m 9s
split-units (java-shared-config, 26)	1m 52s
split-dependencies (java-shared-config)	2m 10s
conditional-required-check	4s
	5h 8m 45s

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