stream: avoid constructing extra promise in `createPromiseCallback` #6266

Job	Run time
Build slim tarball	1m 0s
aarch64-linux: Cache V8 build	24s
x86_64-linux: with shared libraries	3h 22m 41s
x86_64-darwin: with shared libraries	3h 0m 22s
aarch64-darwin: with shared libraries	6h 0m 22s
aarch64-linux: with shared openssl-3.6.1	6h 5m 1s
aarch64-linux: with shared openssl-4.0.0	6h 5m 0s
aarch64-linux: with shared openssl-3.0.19	6h 5m 0s
aarch64-linux: with shared openssl-1.1.1w	6h 5m 0s
aarch64-linux: with shared openssl-3.5.5	6h 5m 0s
	1d 18h 49m 50s

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