Update VERSION to 2.3.0 #4150

Job	Run time
gradle-extended-check (spotlessCheck)	31s
generate-test-matrix	1s
gradle-extended-check (publishToMavenLocal)	44s
link-checker	4s
node-tests (./deployment/cdk/opensearch-service-migration)	1m 4s
node-tests (./deployment/migration-assistant-solution)	26s
python-e2e-tests	13m 36s
python-lint	9s
python-tests (migrationConsole/lib/console_link)	4m 4s
python-tests (migrationConsole/cluster_tools)	2m 4s
workflow-info	2s
python-tests (migrationConsole/console_api)	25s
python-tests (k8sConfigMapUtilScripts)	22s
gradle-tests (0)	3m 58s
gradle-tests (1)	3m 51s
gradle-tests (2)	4m 20s
gradle-tests (3)	3m 59s
gradle-tests (4)	4m 3s
gradle-tests (5)	3m 59s
gradle-tests (6)	3m 53s
gradle-tests (7)	4m 7s
gradle-tests (8)	4m 4s
gradle-tests (9)	4m 8s
gradle-tests (10)	3m 49s
gradle-tests (11)	4m 3s
gradle-tests (12)	4m 10s
gradle-tests (13)	3m 56s
gradle-tests (14)	4m 1s
gradle-tests (15)	4m 1s
gradle-tests (16)	4m 11s
gradle-tests (17)	4m 12s
gradle-tests (18)	3m 57s
gradle-tests (19)	4m 3s
gradle-tests (20)	4m 1s
gradle-tests (21)	3m 48s
gradle-tests (22)	3m 56s
gradle-tests (23)	4m 10s
gradle-tests (24)	4m 9s
gradle-tests (25)	4m 3s
gradle-tests (26)	4m 0s
gradle-tests (27)	3m 57s
gradle-tests (28)	3m 58s
gradle-tests (29)	3m 54s
jacoco-aggregate	39s
all-ci-checks-pass	1s
	2h 24m 53s

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