RTC: Use transients for awareness state (KISS approach). #26589

Job	Run time
Core running from src / Linux	4m 11s
Core running from src / Windows	7m 56s
Core running from src / MacOS	4m 47s
Core running from build / Linux	4m 22s
Core running from build / Windows	10m 22s
Core running from build / MacOS	5m 4s
Slack Notifications	-1s
Failed workflow tasks	0s
	36m 41s

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