Add C++ runtime for speech enhancement GTCRN models (#1977)

See also https://github.com/Xiaobin-Rong/gtcrn

.github/scripts/test-offline-speech-denoiser.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+
+set -ex
+
+log() {
+  # This function is from espnet
+  local fname=${BASH_SOURCE[1]##*/}
+  echo -e "$(date '+%Y-%m-%d %H:%M:%S') (${fname}:${BASH_LINENO[0]}:${FUNCNAME[1]}) $*"
+}
+
+if [ -z $EXE ]; then
+  EXE=./build/bin/sherpa-onnx-offline-denoiser
+fi
+
+echo "EXE is $EXE"
+echo "PATH: $PATH"
+
+which $EXE
+
+log "------------------------------------------------------------"
+log "Run gtcrn"
+log "------------------------------------------------------------"
+curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/speech-enhancement-models/gtcrn_simple.onnx
+curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/speech-enhancement-models/speech_with_noise.wav
+
+$EXE \
+  --debug=1 \
+  --speech-denoiser-gtcrn-model=./gtcrn_simple.onnx \
+  --input-wav=./speech_with_noise.wav \
+  --output-wav=./enhanced_speech_16k.wav
+
+rm ./gtcrn_simple.onnx