Simplify collectFields for @defer & @stream #1640

Job	Run time
Security check of added dependencies	4s
Diff content of NPM package	2m 19s
ci / Check health of package-lock.json file	37s
ci / Run CodeQL security scan	1m 31s
ci / Run fuzzing tests	52s
ci / Run integration tests	1m 41s
ci / Lint source files	1m 14s
ci / Run tests on Node v16	56s
ci / Build 'denoDist' artifact	57s
ci / Run tests on Node v18	1m 1s
ci / Build 'npmDist' artifact	1m 46s
ci / Run tests on Node v19	43s
ci / Build website	2m 26s
ci / Check for commonly ignored files	5s
	16m 12s

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