Add Data Loss Prevention Example

[dagardner-nv]

Description

• Incorporates DLP work from @tzemicheal into a Morpheus example
• Add new overload of get_column(const std::string& column_name) to TableInfoBase
• Update huggingface_hub and transformers packages to versions compatible with gliner. Add explicit dep on yaml (previously this was a transient dep).
• Unfortunately the gliner package needs to be installed manually (documented in examples/data_loss_prevention/README.md). The main reason for this is to avoid a CPU build of onnxruntime from being installed (ref: Installing gliner[gpu] installs both onnxruntime and onnxruntime-gpu urchade/GLiNER#267)
• Add new gliner-bi-encoder-onnx model to repo and models container
• Fix serialization issue when struct columns are written out to disk [BUG]: Serializing a cuDF DataFrame with struct columns results in loosing keys #2236
• Add Parquet support to write_df_to_file

fixes #2236
fixes #2237

By Submitting this PR I confirm:

• I am familiar with the Contributing Guidelines.
• When the PR is ready for review, new or existing tests cover these changes.
• When the PR is ready for review, the documentation is up to date with these changes.

[willkill07]

All of the code changes, documentation, and other improvements look good (based off of changes since my last review)

[hsin-c]

Thanks for resolving the comments, all looks good to me.

[dagardner-nv]

/merge