Create ONNX version of snowflake-arctic-embed-l

[lintool]

Take snowflake-arctic-embed-l from HuggingFace and create an ONNX version thereof.

First, start here: https://github.com/castorini/anserini/blob/master/docs/onnx-conversion.md

Try and reproduced that ONNX conversion - If you've done it right, then you should be able to reproduce this with your newly created model:
https://github.com/castorini/anserini/blob/master/docs/regressions/regressions-msmarco-v1-passage.splade-pp-ed.onnx.md

Then, follow the same procedure to convert snowflake-arctic-embed-l.

[lintool]

Initial work on #2686 - already merged.

[lintool]

@b8zhong next steps here? we actually need to convert the snowflake model to onnx, add bindings, etc.?

[b8zhong]

Did conversion; doing java bindings now.