Add PR artifact uploads and comments #5

Job	Run time
Test Processing	3m 8s
(macos/aarch64) Create Processing Build	4m 46s
(macos/x64) Create Processing Build	4m 37s
(linux/aarch64) Create Processing Build	3m 57s
(windows/x64) Create Processing Build	5m 23s
(linux/x64) Create Processing Build	4m 17s
	26m 8s

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