Revert "refactor(@angular/ssr): handle promise-like results from `loa… #2115

Job	Run time
list	31s
workflow (build-cli)	1m 37s
workflow (devkit-core-tests)	1m 25s
workflow (modules-builder-tests)	1m 51s
workflow (build-unit-tests)	2m 30s
workflow (devkit-core-tests-rerun)	1m 20s
	9m 14s

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