Use python venv location set by setup.sh

Change-Id: Ie0429a383ce5521f34d89084bbb5fa6cfac9c87e

kgdb.sh

diff --git a/kgdb.sh b/kgdb.sh
index 05992fb..1756035 100755
--- a/kgdb.sh
+++ b/kgdb.sh
@@ -35,7 +35,7 @@
 USE_SEL4_EXTENSIONS="true"
 USE_SEL4_SYMBOL_AUTOSWITCHING="false"
 
-export PYTHONPATH=${ROOTDIR}/cache/python-venv/lib/python3.11/site-packages/:${PYTHONPATH}
+export PYTHONPATH=${PYTHON_SHODAN_ENV}/lib/python3.11/site-packages/:${PYTHONPATH}
 export SOURCE_DIR=${ROOTDIR}/cantrip
 export BUILD_DIR=$CANTRIP_OUT