NOTSOFAR prep fixes

[Lakoc]

This PR updates the NOTSOFAR-1 dataset generation recipe with the following changes:

• Replaced azcopy (which caused authentication errors) with huggingface-hub for downloading NOTSOFAR data.
• Updated Lhotse version dependency.
• Added generation of single-channel Lhotse manifests.

Intended use

Dataset generation

chime-utils dgen notsofar1 $DATA_DIR/nsf $DATA_DIR/notsofar --part="train,dev,eval"

Lhotse manifest preparation

# Single-channel manifests
chime-utils lhotse-prep notsofar1 \
  -d train_sc,dev_sc,eval_sc \
  --txt-norm none -m sdm \
  $DATA_DIR/notsofar $MANIFESTS_DIR

# Multi-channel manifests
chime-utils lhotse-prep notsofar1 \
  -d train,dev,eval \
  --txt-norm none -m mdm \
  $DATA_DIR/notsofar $MANIFESTS_DIR