refactor(tools): Split build pytest into multiple jobs

.gitlab/ci/test-win.yml

@@ -73,12 +73,13 @@ test_tools_win:
     - . .\export.ps1
     - python "${SUBMODULE_FETCH_TOOL}" -s "all"
     - cd ${IDF_PATH}\tools\test_build_system
-    - pytest --junitxml=${CI_PROJECT_DIR}\XUNIT_RESULT.xml
+    - pytest --parallel-count ${CI_NODE_TOTAL} --parallel-index ${CI_NODE_INDEX} --junitxml=${CI_PROJECT_DIR}\XUNIT_RESULT.xml
 
 pytest_build_system_win:
   extends:
     - .test_build_system_template_win
     - .rules:labels:windows_pytest_build_system
+  parallel: 2
   needs: []
   tags:
     - windows-build