Add noverific task to test the non verific code

Mostly for CI to ensure fallback code still functions as intended.a
Also reverted the change in the grep command to 1 line after.

docs/examples/fifo/fifo.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-python3 $SBY_MAIN -f fifo.sby
+python3 $SBY_MAIN -f fifo.sby basic cover noverific
 
 if [[ $? -ne 0 ]] ; then
     exit 1