feat: Add fetchAll method for Parse pointers #540

Job	Run time
windows	2m 58s
spm-test	6m 17s
test (platform=iOS\ Simulator,name=iPhone\ 14\ Pro\ Max, test)	20m 10s
linux	2m 9s
test (platform\=tvOS\ Simulator,name\=Apple\ TV, test)	8m 38s
test (platform=watchOS\ Simulator,name=Apple\ Watch\ Series\ 5\ \(40mm\), build)	2m 32s
test (platform=macOS, test)	7m 43s
xcode-test-5_5	1m 31s
cocoapods	7m 49s
docs	1m 43s
	1h 1m 30s

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