Add PR artifact uploads and comments #190

Job	Run time
Test Processing	3m 11s
(macos/aarch64) Create Processing Build	4m 20s
(windows/x64) Create Processing Build	5m 3s
(linux/aarch64) Create Processing Build	3m 22s
(macos/x64) Create Processing Build	5m 25s
(linux/x64) Create Processing Build	4m 32s
	25m 53s

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