Expo Router integration improvement: Prefetch route performance measurement with automatically created spans #10841

Job	Run time
Ready-to-merge gate / Missing "ready-to-merge" label	2s
diff_check / diff_check	9s
Build legacy android dev no-frameworks	9m 1s
Build legacy ios production dynamic-frameworks	35m 37s
Build legacy macos dev no-frameworks	23m 50s
Build legacy ios dev no-frameworks	26m 48s
Build legacy android production no-frameworks	12m 53s
Build new ios dev no-frameworks	35m 52s
Build legacy ios production no-frameworks	32m 18s
Build legacy ios dev dynamic-frameworks	41m 37s
Build new android production no-frameworks	15m 29s
Build new ios production no-frameworks	39m 1s
Build legacy macos production no-frameworks	18m 5s
Build new android dev no-frameworks	13m 51s
Test ios production REV2	12m 38s
Test android production REV2	5m 13s
	5h 22m 24s

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