Break genesis loading and checks out of load_blockstore() (#2436) #4020

Job	Run time
android (ubuntu-20.04, x86_64-linux-android)	2m 48s
ios (macos-12, aarch64-apple-ios)	4m 23s
android (ubuntu-20.04, aarch64-linux-android)	2m 55s
ios (macos-12, x86_64-apple-ios)	5m 59s
android (ubuntu-20.04, i686-linux-android)	2m 49s
ios (macos-12, aarch64-apple-darwin)	3m 42s
android (ubuntu-20.04, armv7-linux-androideabi)	3m 14s
ios (macos-12, x86_64-apple-darwin)	4m 51s
error_reporting	0s
	30m 41s

Provide feedback