feat: add support for poetry

Poetry will be used for tracking python package dependencies. Utilise
poetry when running scripts. Ensure that the internal CI has access to
to the package.

Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
Change-Id: I3b0991f4fdadc678b50a6bfdce1b374a7e524c2b
diff --git a/script/install_python_deps_tf.sh b/script/install_python_deps_tf.sh
index 62fd795..e12dfc4 100644
--- a/script/install_python_deps_tf.sh
+++ b/script/install_python_deps_tf.sh
@@ -14,7 +14,6 @@
     export PIP_CACHE_DIR=${project_filer}/pip-cache
 
     python3 -m pip install --upgrade pip
-    python3 -m pip install -r "${tf_root}/docs/requirements.txt" ||
-        python3 -m pip install -r "${tf_root}/docs/requirements.txt"  \
-            --no-cache-dir # Avoid cache concurrency issues
+    python3 -m pip install poetry==1.3.2 ||
+            python3 -m pip install poetry==1.3.2 --no-cache-dir
 )