Bump version to 10.7.0.0a8 #1759

Job	Run time
build (linux-platform25)	8m 25s
build (linux-debug-platform25)	8m 25s
build (macos-arm64-platform25)	8m 25s
build (windows-platform25)	8m 31s
build (linux-platform24)	8m 25s
build (windows-debug-platform25)	8m 26s
	50m 37s

Provide feedback