Che operator redistributes restic, but does not include 2-Clause BSD license

[nickboldt]

The Che operator build now depends on a 3rd party binary called restic.

https://github.com/eclipse-che/che-operator/blob/main/Dockerfile#L19-L20

this code is under the BSD 2 / FreeBSD license, https://github.com/restic/restic/, which means we have to include the license next to the binary if we redistribute it.

Redistributions in binary form must reproduce the above copyright notice, 
this list of conditions and the following disclaimer in the documentation 
and/or other materials provided with the distribution.

-- https://opensource.org/licenses/BSD-2-Clause

Seems you're just redistributing the binary, but not the license.

[mmorhun]

Fixed