`zig objcopy`: Strip support

[Ristovski]

Ref: #9261 and #13916

Taken from GNU objcopy:

  -S --strip-all                   Remove all symbol and relocation information
  -g --strip-debug                 Remove all debugging symbols & sections
     --strip-dwo                   Remove all DWO sections
     --strip-unneeded              Remove all symbols not needed by relocations
  -N --strip-symbol <name>         Do not copy symbol <name>
     --strip-unneeded-symbol <name>
                                   Do not copy symbol <name> unless needed by
                                     relocations

For starters, having -S --strip-all and -g --strip-debug would be a great improvement.

[cjiupar]

After doing some light research on the elf file format this might be something I can do.

[xxxbxxx]

made a first attempt at this: https://github.com/ziglang/zig/pull/14882