erts: Refactor bitstring (binary) handling #13321

Job	Run time
Build Erlang/OTP (64-bit)	9m 12s
Event File	3s
Build Erlang/OTP (Windows)	18m 4s
Build Erlang/OTP (32-bit)	8m 34s
Build Erlang/OTP (iOS)	6m 44s
Build Erlang/OTP (cross-compile)	24m 33s
Build Erlang/OTP (macOS)	12m 34s
Build Erlang/OTP (clang)	5m 48s
Build Erlang/OTP (Types and Flavors)	5m 22s
Build and check documentation	8m 39s
Run static analysis	6m 50s
Test Erlang/OTP (emulator)	54m 34s
Test Erlang/OTP (debug)	3m 14s
Test Erlang/OTP (crypto)	5m 10s
Release Erlang/OTP	0s
Test Erlang/OTP (system)	9m 10s
	2h 58m 31s

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