Revert "[Doctests] Refactor doctests + add CI" (#23245)

Revert "[Doctests] Refactor doctests + add CI (#22987)"

This reverts commit 627f44799a.

.github/workflows/doctests.yml

@@ -37,10 +37,18 @@ jobs:
       - name: Show installed libraries and their versions
         run: pip freeze
 
+      - name: Prepare files for doctests
+        run: |
+          python3 utils/prepare_for_doc_test.py src docs
+
       - name: Run doctests
         run: |
           python3 -m pytest -v --make-reports doc_tests_gpu --doctest-modules $(cat utils/documentation_tests.txt) -sv --doctest-continue-on-failure --doctest-glob="*.mdx"
 
+      - name: Clean files after doctests
+        run: |
+          python3 utils/prepare_for_doc_test.py src docs --remove_new_line
+
       - name: Failure short reports
         if: ${{ failure() }}
         continue-on-error: true