Simplify collectFields for @defer & @stream #1634

Job	Run time
Security check of added dependencies	3s
Diff content of NPM package	2m 11s
ci / Build 'denoDist' artifact	1m 10s
ci / Build 'npmDist' artifact	2m 22s
ci / Build website	1m 40s
ci / Check for commonly ignored files	3s
ci / Run CodeQL security scan	1m 28s
ci / Check health of package-lock.json file	34s
ci / Run fuzzing tests	39s
ci / Run integration tests	1m 32s
ci / Lint source files	2m 3s
ci / Run tests on Node v16	37s
ci / Run tests on Node v18	54s
ci / Run tests on Node v19	59s
	16m 15s

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