[ApolloPagination] Add conditional `Equatable` conformance to pagers #948

Job	Run time
Codegen Test Configurations - macOS	5m 54s
Cocoapods Integration Tests - macOS	19s
Run swift build for SPM packages (apollo-ios)	53s
changes	4s
Run swift build for SPM packages (apollo-ios-codegen)	51s
Run swift build for SPM packages (apollo-ios-pagination)	1m 9s
Run Tuist Generation	1m 23s
Verify Frontend Bundle Latest - macOS	0s
Apollo Integration Tests - macOS	0s
Apollo Unit Tests - macOS	9s
Codegen CLI Unit Tests - macOS	12s
Codegen Lib Unit Tests - macOS	28s
ApolloPagination Unit Tests - macOS	2m 19s
	13m 41s

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