Mesh automated testing: improve progress printing

Print number of total tests with each test to show how many tests have been executed and how many are left.
Example: `Running test 27/36: PlaneFaceSplitByEdges...`

Reviewed By: calra, mont29

Differential Revision: https://developer.blender.org/D10278

tests/python/modules/mesh_test.py

@@ -662,8 +662,7 @@ class RunTest:
             test_name = each_test.test_name
             if self.verbose:
                 print()
-                print("Running test {}...".format(test_number))
-                print("Test name {}\n".format(test_name))
+                print("Running test {}/{}: {}...".format(test_number+1, len(self.tests), test_name))
             success = self.run_test(test_name)
 
             if not success: