PYTHON-4644 Use a random name for hatchenv (mongodb#1782)

Author: blink1073

.evergreen/hatch.sh

@@ -13,8 +13,11 @@ if $PYTHON_BINARY -m hatch --version; then
       $PYTHON_BINARY -m hatch run "$@"
     }
 else # No toolchain hatch present, set up virtualenv before installing hatch
-    createvirtualenv "$PYTHON_BINARY" hatchenv
-    trap "deactivate; rm -rf hatchenv" EXIT HUP
+    # Use a random venv name because the encryption tasks run this script multiple times in the same run.
+    ENV_NAME=hatchenv-$RANDOM
+    createvirtualenv "$PYTHON_BINARY" $ENV_NAME
+    # shellcheck disable=SC2064
+    trap "deactivate; rm -rf $ENV_NAME" EXIT HUP
     python -m pip install -q hatch
     run_hatch() {
       python -m hatch run "$@"

.evergreen/utils.sh

@@ -43,7 +43,7 @@ find_python3() {
 createvirtualenv () {
     PYTHON=$1
     VENVPATH=$2
-    rm -rf $VENVPATH
+
     # Prefer venv
     VENV="$PYTHON -m venv"
     if [ "$(uname -s)" = "Darwin" ]; then