More CMake build changes
More CMake build changes

- Move some IDA utility sources into `binexport_plugin_shared`, so that
  BinDiff can use it directly
- Update internal build scripts

PiperOrigin-RevId: 346335582
Change-Id: I1e8a4155e289d27013ffccb2831e953f23e0df8a

google/binexport,google/binexport,cblichmann/binexport,google/binexport,cblichmann/binexport,cblichmann/binexport