chore: Add shared helper functions used across the livekit-rtc test s… #1482

Job	Run time
Make RTC sdist	16s
Build RTC wheels (aarch64)	1m 11s
Build RTC wheels (AMD64)	1m 34s
Build RTC wheels (x86_64 arm64)	54s
Build RTC wheels (x86_64)	54s
Generating protobuf	0s
Test (ubuntu-latest, Python 3.11) / Test (ubuntu-latest, Python 3.11)	1m 18s
Test (ubuntu-latest, Python 3.13) / Test (ubuntu-latest, Python 3.13)	1m 20s
Test (ubuntu-latest, Python 3.9) / Test (ubuntu-latest, Python 3.9)	1m 29s
Test (ubuntu-latest, Python 3.12) / Test (ubuntu-latest, Python 3.12)	1m 20s
Test (ubuntu-latest, Python 3.14) / Test (ubuntu-latest, Python 3.14)	1m 22s
Test (macos-latest, Python 3.14) / Test (macos-latest, Python 3.14)	1m 47s
Test (macos-latest, Python 3.9) / Test (macos-latest, Python 3.9)	2m 9s
Test (ubuntu-latest, Python 3.10) / Test (ubuntu-latest, Python 3.10)	1m 23s
Test (macos-latest, Python 3.12) / Test (macos-latest, Python 3.12)	1m 42s
Test (windows-latest, Python 3.12) / Test (windows-latest, Python 3.12)	2m 2s
Test (windows-latest, Python 3.9) / Test (windows-latest, Python 3.9)	2m 21s
Test (windows-latest, Python 3.14) / Test (windows-latest, Python 3.14)	1m 59s
Publish RTC release	0s
docs	0s
	25m 1s

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