ref(profiling): extract methods related to profile serialization #7806

Job	Run time
UI Tests for ios_objc on Simulators	5m 20s
UI Tests with Address Sanitizer	16m 23s
UI Tests for tvos_swift on Simulators	4m 11s
UI Tests for SwiftUI on iPhone 8 (15.2) Simulator	5m 15s
UI Tests for SwiftUI on iPhone 8 (16.1) Simulator	9m 12s
iOS-Swift UI Tests iPhone 8 (13.7)	7m 20s
iOS-Swift UI Tests iPhone 8 (15.5)	7m 8s
iOS-Swift UI Tests iPhone 14 (16.4)	12m 51s
iOS-Swift UI Tests iPhone 15 (17.2)	10m 35s
	1h 18m 15s

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