Many deprecated errors when attempting to build microbenchmarks

[Fjf]

Modern compilers (Clang 13.0.1, GCC 11.3.0) throw -Wdeprecated-copy warnings while building the microbenchmarks.
The -Werror flag in the Makefiles makes it so the compilation doesn't continue.
I saw in unittests this flag was removed in a later commit, so maybe this also needs to be removed for the former.
Alternatively, the -Wdeprecated-copy issues have to be fixed in the code.