fix(ios): Skip source maps upload on Debug builds #14971

Job	Run time
Ready-to-merge gate / Missing "ready-to-merge" label	3s
detect-changes / Detect file changes	7s
diff_check / diff_check	11s
Build new ios production no-frameworks	9m 12s
Build new android production	21m 38s
Build new android dev	20m 1s
Build legacy macos dev	5m 37s
Build legacy macos production	6m 14s
Build new ios dev no-frameworks	9m 18s
Test ios production REV2 on bitrise	6m 45s
Test ios production REV2 on cirrus	6m 11s
Test android production REV2	5m 51s
	1h 31m 8s

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