refactor: roll out stream helpers to qwen lmstudio fireworks specs (#… #3748

Job	Run time
platform-unit-test (windows-latest)	10m 3s
invisible-chars	6s
compile	2m 20s
platform-unit-test (ubuntu-latest)	4m 16s
knip	54s
check-translations	35s
dependency-review	-1s
	18m 13s

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