- Add Java API for appending QNN EP
- Update Java unit test setup
- Fix issues with setting system properties for tests
- Unify Windows/non-Windows setup to simplify
### Description
Updating the build option for enabling training in java builds from
ENABLE_TRAINING -> ENABLE_TRAINING_APIS.
In the native codebase ENABLE_TRAINING is used for enabling full
training and ENABLE_TRAINING_APIS is used for creating the lte builds
with training apis. Making the change to sync the naming convention
across all the language bindings.
It was a bit confusing to see ENABLE_TRAINING when debugging the android
build failures for training. Making this change just to improve
readability of logs during debugging.
### Motivation and Context
<!-- - Why is this change required? What problem does it solve?
- If it fixes an open issue, please link to the issue here. -->
* [java] - adding a cuda enabled test.
* Adding --build_java to the windows gpu ci pipeline.
* Removing a stray line from the unit tests that always enabled CUDA for Java.
