As booting on DCS-7060DX4-32 would use the default sku of DCS-7060PX4-32 which is not compatible,
thus move some files around to properly separate the configurations that are device specific.
Signed-off-by: Samuel Angebault <staphylo@arista.com>
platform.json is needed for sonic-mgmt testing. Also in the future it will be used as part of dynamic port breakout.
Also removed the folder symlink for BlackhawkDD because it has a different platform.json than BlackhawkO.
Co-authored-by: Zhi Yuan Carl Zhao <zyzhao@arista.com>