Release asset `revad_v3.5.0_linux_amd64` seems broken

[uellue]

The README states

"Installation Head to the Releases to get the latest available release."

There one finds a changelog and files to download without instructions what to do with them. I assumed the files were executables and associated checksums.

How to reproduce

wget https://github.com/cs3org/reva/releases/download/v3.5.0/revad_v3.5.0_linux_amd64
chmod a+x ./revad_v3.5.0_linux_amd64
./revad_v3.5.0_linux_amd64

What happens

(base) weber@iff007:~/Downloads$ ./revad_v3.5.0_linux_amd64
./revad_v3.5.0_linux_amd64: line 1: syntax error near unexpected token `newline'
./revad_v3.5.0_linux_amd64: line 1: `!<arch>'

Looking at the file, it is an ar archive with two files that have cryptic names.

What should happen

I'd expect that executing this file runs revad.

That only leaves compiling from source with #4642 unresolved.

CC @sk1p @ritwikshanker