Add better `needs_web` check to CI #12363

Job	Run time
Ready-to-merge gate / Missing "ready-to-merge" label	2s
detect-changes / Detect file changes	4s
diff_check / diff_check	11s
Build legacy android production no-frameworks	9m 55s
Build new ios dev no-frameworks	11m 10s
Build legacy ios dev no-frameworks	8m 43s
Build legacy macos dev no-frameworks	5m 53s
Build legacy ios production dynamic-frameworks	9m 25s
Build legacy android dev no-frameworks	9m 32s
Build new android dev no-frameworks	10m 35s
Build new ios production no-frameworks	10m 21s
Build legacy ios dev dynamic-frameworks	9m 59s
Build legacy macos production no-frameworks	5m 59s
Build legacy ios production no-frameworks	9m 18s
Build new android production no-frameworks	11m 59s
Test ios production REV2	4m 41s
Test android production REV2	24m 34s
	2h 22m 21s

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