Adding snap classic confinement support #244

Job	Run time
Test Processing	3m 47s
(linux/aarch64) Create Processing Build	8m 23s
(macos/aarch64) Create Processing Build	3m 55s
(linux/x64) Create Processing Build	10m 37s
(macos/x64) Create Processing Build	8m 36s
(windows/x64) Create Processing Build	6m 22s
	41m 40s

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