feat: 🐍 add mamba support (#1589)

feat(mamba): Initial import

This is a first iteration of the mamba backend, loosely based on
mamba-chat(https://github.com/havenhq/mamba-chat).

backend/python/mamba/install.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+##
+## A bash script installs the required dependencies of VALL-E-X and prepares the environment
+export PATH=$PATH:/opt/conda/bin
+
+if [ "$BUILD_TYPE" != "cublas" ]; then
+    echo "[mamba] Attention!!! nvcc is required - skipping installation"
+    exit 0
+fi
+
+# Activate conda environment
+source activate transformers
+
+echo $CONDA_PREFIX
+
+pip install causal-conv1d==1.0.0 mamba-ssm==1.0.1
+
+if [ "$PIP_CACHE_PURGE" = true ] ; then
+    pip cache purge
+fi