Stub out 4.24 migration docs. Change-Id: I92373f8dab421e08dddf945ed981e3b3b4fe42ea Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.common/+/191759 Tested-by: Alexander Kurtakov <akurtako@redhat.com> Reviewed-by: Alexander Kurtakov <akurtako@redhat.com>