Refactor group to use gen_statem #17100

Job	Run time
Event File	2s
Build Erlang/OTP (64-bit)	6m 5s
Build Erlang/OTP (iOS)	7m 38s
Build Erlang/OTP (macOS)	6m 4s
Build Erlang/OTP (Types and Flavors)	7m 37s
Build Erlang/OTP (Windows)	13m 33s
Build Erlang/OTP (32-bit)	9m 43s
Build Erlang/OTP (cross-compile)	16m 15s
Build Erlang/OTP (clang)	5m 33s
Build and check documentation	5m 16s
Run static analysis	6m 32s
Test Erlang/OTP (kernel)	1h 4m 38s
Test Erlang/OTP (ssh)	17m 30s
Test Erlang/OTP (stdlib)	57m 53s
Release Erlang/OTP	0s
Test Erlang/OTP (system)	7m 45s
	3h 52m 4s

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