Bump version to 10.7.0.0a4 #1710

Job	Run time
build (linux-debug-platform25)	19m 45s
build (linux-platform25)	18m 9s
build (macos-arm64-platform25)	12m 18s
build (windows-platform25)	26m 25s
build (windows-debug-platform25)	22m 17s
build (linux-platform24)	18m 46s
	1h 57m 40s

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