oniro-linux-blueprint-eddie: move IMAGE_INSTALL into image recipe

• move IMAGE_INSTALL from distro config into blueprint-eddie-gateway-image
• add an eddie image, now we have two images: a gateway + eddie image and an image with just eddie.

This allows to have a single gateway device and other non-gateway devices running eddie.

Signed-off-by: Francesco Pham francesco.pham@huawei.com