[SKIP SOF-TEST] .github:: add pull request workflow for Zephyr shell builds #23080

Job	Run time
manifest-check	2m 44s
build-windows (mnfst, lnl)	9m 13s
build-windows (mnfst, tgl-h)	8m 10s
build-windows (mnfst, ptl)	12m 59s
build-windows (mnfst, mtl)	9m 20s
build-windows (mnfst, tgl)	9m 13s
build-windows (mnfst, imx8 imx8x)	9m 52s
build-windows (mnfst, imx8m imx8ulp)	12m 30s
LP64-WIP	3m 53s
build-windows (-d, mnfst, lnl)	9m 38s
build-linux (mnfst, tgl)	5m 8s
build-linux (mnfst, wcl imx95)	7m 50s
build-linux (mnfst, ptl)	6m 8s
build-linux (mnfst, imx8m imx8ulp)	4m 56s
build-linux (-d, mnfst, lnl)	5m 5s
build-linux (mnfst, mtl)	4m 44s
build-linux (mnfst, lnl)	4m 25s
build-linux (mnfst, imx8 imx8x)	5m 0s
build-linux (mnfst, tgl-h)	3m 59s
compare-linux-win	38s
	2h 15m 25s

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