ci : set GGML_NATIVE=OFF for bindings-java (#3830)

* ci : set GGML_NATIVE=OFF for bindings-java

This commit attempts to address an issue with the bindings-java job
which is currently failing.

I've not been able to reproduce this locally my windows machine and I
suspect that what might be happning is that windows job compiles on a
runner where it has different CPU features, for example AVX512 and when
this dll is used on a different runner that does not have that feature
it will crash.

Refs: https://github.com/ggml-org/whisper.cpp/actions/runs/26496174929/job/78059073255?pr=3829

* ci : also disable BMI2