[Release] Update versions for Release 10.21.0 #5120

Job	Run time
spm (macos-12, Xcode_14.2)	4m 29s
spm-cron	0s
spm (macos-13, Xcode_15.1)	7m 53s
storage-integration-tests (Swift)	20m 57s
storage-integration-tests (ObjC)	10m 33s
quickstart (macos-12, Xcode_14.2)	11m 44s
quickstart (macos-13, Xcode_15.1)	21m 3s
pod-lib-lint (ios, macos-12)	3m 55s
pod-lib-lint (ios, macos-13)	9m 50s
pod-lib-lint (tvos, macos-12)	3m 44s
quickstart-ftl-cron-only	0s
pod-lib-lint (tvos, macos-13)	5m 22s
pod-lib-lint (macos, macos-12)	3m 11s
pod-lib-lint (macos, macos-13)	6m 14s
pod-lib-lint (watchos, macos-12)	3m 13s
pod-lib-lint (watchos, macos-13)	4m 48s
storage-cron-only	0s
	1h 56m 56s

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