Update dependency @intlify/unplugin-vue-i18n to v3 (#1009) #1455

Job	Run time
webclient-linting	43s
webclient-e2e-test (chrome)	2m 1s
webclient-e2e-test (firefox)	1m 56s
webclient-build / build	1m 39s
webclient-deployment / Restart the deployment	4s
	6m 23s

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