Add PR artifact uploads and comments #17

Job	Run time
Test Processing	3m 1s
(linux/aarch64) Create Processing Build	3m 49s
(macos/x64) Create Processing Build	3m 34s
(windows/x64) Create Processing Build	5m 29s
(macos/aarch64) Create Processing Build	5m 18s
(linux/x64) Create Processing Build	4m 17s
	25m 28s

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