[substitutions] add missing safe globals tests (#10814)

tests/unit_tests/fixtures/substitutions/02-expressions.approved.yaml

@@ -22,3 +22,6 @@ test_list:
   - The pin number is 18
   - The square root is: 5.0
   - The number is 80
+  - ord("a") = 97
+  - chr(97) = a
+  - len([1,2,3]) = 3

tests/unit_tests/fixtures/substitutions/02-expressions.input.yaml

@@ -20,3 +20,6 @@ test_list:
   - The pin number is ${pin.number}
   - The square root is: ${math.sqrt(area)}
   - The number is ${var${numberOne} + 1}
+  - ord("a") = ${ ord("a") }
+  - chr(97) = ${ chr(97) }
+  - len([1,2,3]) = ${ len([1,2,3]) }