/internal/storage/dolt: fix windows build issue

internal/storage/dolt/procattr_unix.go

@@ -0,0 +1,15 @@
+//go:build !windows
+// +build !windows
+
+package dolt
+
+import (
+	"os/exec"
+	"syscall"
+)
+
+func setDoltServerSysProcAttr(cmd *exec.Cmd) {
+	cmd.SysProcAttr = &syscall.SysProcAttr{
+		Setpgid: true,
+	}
+}