General: Migrate to Actions-driven release flow #375

Job	Run time
Build apps (Foss, Debug, app)	4m 33s
Fastlane metadata	7s
Unit tests (Debug, testFoss)	3m 45s
Build apps (Gplay, Debug, app)	4m 34s
Release tooling	31s
Unit tests (Debug, testGplay)	3m 36s
Lint vitals (Foss, Release, app)	3m 5s
Lint vitals (Foss, Beta, app)	2m 50s
Lint vitals (Gplay, Release, app)	3m 2s
Lint vitals (Gplay, Beta, app)	3m 7s
	29m 10s

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