Adjust SpongeWorldManager behaviour #2517

Job	Run time
build / build	15m 4s
integrationTest / integrationTest (ubuntu-22.04, 21)	45s
integrationTest / integrationTest (macos-latest, 21)	51s
integrationTest / integrationTest (windows-latest, 21)	1m 3s
publish (common)	2m 6s
publish (vanilla)	2m 14s
publish (neoforge)	2m 4s
publish (forge)	2m 42s
	26m 49s

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