mark joint iteration proposal features as shipped in FF148 #1415

Job	Run time
list-branches	8s
Build for v3	13s
Build for v4	5s
Build for v4-types	2m 24s
Build for proposals-types	9s
Build for master	46s
Build for data-view-clamped-stage-2	7s
Build for web	10s
Build for json-source-stable	5s
combine-pages-and-deploy	1m 25s
	5m 32s

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