chore(NODE-6502) Address two other usages of system python (mongodb#4324)

Co-authored-by: Bailey Pearson <[email protected]>
(cherry picked from commit 247284e)

Author: blink1073

.evergreen/run-azure-kms-mock-server.sh

@@ -4,6 +4,9 @@ if [ -z ${DRIVERS_TOOLS+omitted} ]; then echo "DRIVERS_TOOLS is unset" && exit 1
 
 set -o errexit
 
-python3 $DRIVERS_TOOLS/.evergreen/csfle/bottle.py fake_azure:imds &
+pushd $DRIVERS_TOOLS/.evergreen/csfle
+. ./activate-kmstlsvenv.sh
+python bottle.py fake_azure:imds &
+popd
 
 echo "Running Azure KMS idms server on port 8080"

.evergreen/run-socks5-tests.sh

@@ -7,7 +7,7 @@ set -o xtrace  # For debuggability, no external credentials are used here
 
 node -v
 
-PYTHON_BINARY=${PYTHON_BINARY:-python3}
+PYTHON_BINARY=$(bash -c ". $DRIVERS_TOOLS/.evergreen/find-python3.sh && ensure_python3 2>/dev/null")
 
 # ssl setup
 SSL=${SSL:-nossl}