ci: stabilize WebRTC integration benchmark #488

Job	Run time
Packages and VS Code extension	35s
Client lint, build, and tests	40s
Build integration artifacts	2m 18s
Rust lint and unit tests	1m 20s
Android emulator integration	6m 24s
WebRTC stream benchmark	6m 35s
CLI simulator integration	12m 56s
JS API simulator integration	5m 8s
	35m 56s

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