feature: support uploading ISOs to CloudFlare #2029

Job	Run time
build-base (40, silverblue)	6m 53s
build-base (40, kinoite)	9m 27s
build-base (40, cosmic)	5m 42s
build-base (41, silverblue)	7m 26s
build-base (41, kinoite)	9m 24s
build-base (41, cosmic)	6m 31s
build-base (stable, silverblue)	8m 16s
build-base (stable, kinoite)	10m 2s
build-base (stable, cosmic)	6m 26s
build-nvidia (40, silverblue, open)	1m 11s
build-nvidia (40, kinoite, open)	1m 10s
build-nvidia (40, cosmic, open)	1m 11s
build-nvidia (41, silverblue, open)	1m 22s
build-nvidia (41, kinoite, open)	1m 11s
build-nvidia (41, cosmic, open)	1m 22s
build-nvidia (stable, silverblue, open)	1m 11s
build-nvidia (stable, kinoite, open)	1m 10s
build-nvidia (stable, cosmic, open)	1m 22s
check	10s
	1h 21m 27s

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