[FEA][JNI] Add JNI bindings for cudf::strings::integers_to_hex()

[razajafri]

Is your feature request related to a problem? Please describe.
We need a way to convert a string col to a hex string col

Describe the solution you'd like
libcudf already supports this in convert_integers::integers_to_hex(). We should expose this method to Java

Describe alternatives you've considered
None

[gerashegalov]

you can reuse

https://github.com/NVIDIA/spark-rapids-jni/blob/ba6eefaf040a7eae1a4322d9ee5cff27a6fe65da/src/main/java/com/nvidia/spark/rapids/jni/CastStrings.java#L112

https://github.com/NVIDIA/spark-rapids-jni/blob/ba6eefaf040a7eae1a4322d9ee5cff27a6fe65da/src/main/cpp/src/CastStringJni.cpp#L211-L215

[razajafri]

Thanks, let me confirm if that is what we want before closing this issue

[razajafri]

I have confirmed, this works thanks @gerashegalov

[razajafri]

Upon further investigation, the existing feature can't be used as is because it drops the leading zeros which are needed when converting binary data to string to be printed to the screen

[gerashegalov]

you can reuse

https://github.com/NVIDIA/spark-rapids-jni/blob/ba6eefaf040a7eae1a4322d9ee5cff27a6fe65da/src/main/java/com/nvidia/spark/rapids/jni/CastStrings.java#L112

https://github.com/NVIDIA/spark-rapids-jni/blob/ba6eefaf040a7eae1a4322d9ee5cff27a6fe65da/src/main/cpp/src/CastStringJni.cpp#L211-L215

[razajafri]

Thanks, let me confirm if that is what we want before closing this issue

[razajafri]

I have confirmed, this works thanks @gerashegalov

[razajafri]

Upon further investigation, the existing feature can't be used as is because it drops the leading zeros which are needed when converting binary data to string to be printed to the screen