* Add python based build infrastructure to simplify developer builds for various platforms. Majority was copied from the ORT build script so usage is consistent with that.
Left the existing build.bat/build.sh but ideally the CI can be updated to use the new infrastructure so things are more consistent.
Updated gradle to 7.5.1 and Android gradle tools to 7.3.0.
Validated Windows and cross-compiling Android on Windows including builds with explicitly selected ops.
WASM and iOS builds aren't tested yet and might need minor tweaks.
* Update build.py to require Python 3.7, remove git submodule sync, reorder options.
* Use 'cmake -E remove' to remove file.
* Enable specifying the ORT version to fetch
* Add ability to enable Java bindings.
Co-authored-by: Wenbing Li <10278425+wenbingl@users.noreply.github.com>
Co-authored-by: edgchen1 <18449977+edgchen1@users.noreply.github.com>
Scott McKay