CI: update workflows with newer version of Xcode (+ iOS SDK) #3960

Job	Run time
auth_token_check / auth_token_check	3s
Ready-to-merge gate / Missing "ready-to-merge" label	2s
diff_check / diff_check	9s
Build RN 0.83.0 new hermes ios production no	8m 31s
metrics (legacy, ios)	18m 4s
Build RN 0.71.19 legacy jsc android production no	4m 55s
metrics (legacy, android)	24m 39s
metrics (new, android)	12m 25s
Build RN 0.71.19 legacy hermes ios production no	7m 1s
Build RN 0.83.0 legacy hermes ios production dynamic	9m 27s
Build RN 0.71.19 legacy hermes android production no	4m 42s
Build RN 0.83.0 legacy hermes ios production static	9m 2s
Build RN 0.83.0 new hermes ios production static	8m 50s
Build RN 0.83.0 legacy hermes android production no	6m 23s
Build RN 0.71.19 legacy jsc ios production no	6m 44s
metrics (new, ios)	15m 35s
Build RN 0.83.0 legacy hermes ios production no	7m 56s
Build RN 0.83.0 new hermes android production no	5m 52s
Test RN 0.83.0 legacy hermes android production no	17m 5s
Test RN 0.83.0 legacy hermes ios production no	21m 5s
Test RN 0.83.0 new hermes android production no	6m 18s
Test RN 0.83.0 new hermes ios production no	27m 0s
	3h 41m 48s

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