Redirect and retire https://www.eclipse.org/org/foundation page to https://www.eclipse.org/org

The page currently showing up first on our search results for "eclipse foundation" is no longer an active page in our menu. https://www.eclipse.org/org/foundation is no longer an active page and needs to be retired and redirected to the newer https://www.eclipse.org/org/, which is our about page.

Approval from @sgiacomoni2as