Multitenancy - Refactor and fix for config caching #18017

Job	Run time
Run PM4-workflow / build-docker-image-EKS	26m 1s
Run PM4-workflow / Delete Instance	17s
Run PM4-workflow / run-phpunit	1h 12m 44s
Run PM4-workflow / deploy-EKS	54m 33s
Run PM4-workflow / Run API Tests	0s
	2h 33m 35s

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