AVRDUDE v7.3

See Release Notes for changes

1. avrdude-v7.3-windows-*.zip -- Same binaries as official avrdude github page. These binaries will print avrdude version 7.3.
   https://github.com/avrdudes/avrdude/releases/tag/v7.3
   https://github.com/avrdudes/avrdude/actions/runs/7813933855

2. avrdude-v7.3-linux-*.zip and avrdude-v7.3-arduino_mingw32.zip. These binaries will print avrdude version 7.3.
   My own build using Arduino crossbuild container, including libserialport support.

• arduino/avrdude-packing#31

3. avrdude_main_*.tar.gz -- avrdude binaries build from the arduino_packing guthub action. Technically the binaries are not the same as avrdude 7.3 release, but one git commit after 7.3 release. Therefore the binaries will print avrdude version 7.3-20240208 (0179026). They do not have libserialport support
   https://github.com/avrdudes/avrdude/blob/v7.3/.github/workflows/arduino_packing.yml
   https://github.com/avrdudes/avrdude/actions/runs/7814004029

4. Unsupported autotools build
   avrdude_autotools_src-7.3.tar.gz -- source tarball
   avrdude_autotools_bin-7.3.zip -- 64bit Windows MSYS2 mingw64 binary, dynamic link to libraries

5. avrdude_mybin-v7.3-*.zip: my own unofficial MSYS2 mingw32/mingw64 build