fix(learn): tests for python video lessons (#38600)

* fix: improve tests for video challenges

* fix: remove unused challenges + get rid of no description warning

* fix: remove non-existent challenges from meta

client/utils/challengeTypes.js

@@ -126,5 +126,9 @@ exports.helpCategory = {
   'data-analysis-with-python-projects': 'Certification Projects',
   'machine-learning-with-python': 'Certification Projects',
   'machine-learning-with-python-projects': 'Certification Projects',
-  'python-for-everybody': 'Python'
+  'python-for-everybody': 'Python',
+  tensorflow: 'Python',
+  'how-neural-networks-work': 'Python',
+  numpy: 'Python',
+  'data-analysis-with-python-course': 'Python'
 };