[ApolloPagination] Update `PaginationOutput` to operate over `GraphQLResult`s #125

Job	Run time
Cocoapods Integration Tests - macOS	12s
changes	8s
Run swift build for SPM packages (apollo-ios)	39s
Run swift build for SPM packages (apollo-ios-codegen)	48s
Run swift build for SPM packages (apollo-ios-pagination)	50s
Verify CLI Binary Archive - macOS	0s
Verify Frontend Bundle Latest - macOS	0s
Run Tuist Generation	3m 4s
Apollo Unit Tests - macOS	9s
Codegen CLI Unit Tests - macOS	9s
Codegen Lib Unit Tests - macOS	17s
ApolloPagination Unit Tests - macOS	4m 1s
	10m 17s

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