TEST-81-GENERATORS: Do a lazy unmounts

Otherwise we might fail if PID 1 is currently accessing these files.

Fixes #32692 (hopefully)

test/units/generator-utils.sh

@@ -72,7 +72,7 @@ run_and_list() {
     ls -lR "$out_dir"
 
     if [[ -n "${environ:-}" ]]; then
-        umount /proc/1/environ
+        umount /proc/1/environ --lazy
         rm -f "$environ"
     fi
 }

test/units/testsuite-81.getty-generator.sh

@@ -85,5 +85,5 @@ PID1_ENVIRON="SYSTEMD_GETTY_AUTO=0" run_and_list "$GENERATOR_BIN" "$OUT_DIR"
 [[ "$(find "$OUT_DIR" ! -type d | wc -l)" -eq 0 ]]
 
 # Cleanup
-umount /sys/class/tty/console/active
+umount /sys/class/tty/console/active --lazy
 rm -f "${DUMMY_CONSOLES[@]/#//dev/}" /dev/notatty99