👷 Switch from Codecov to Smokeshow plus pytest-cov to pure coverage for internal tests (#5583)

scripts/test-cov-html.sh

@@ -3,4 +3,7 @@
 set -e
 set -x
 
-bash scripts/test.sh --cov-report=html ${@}
+bash scripts/test.sh ${@}
+coverage combine
+coverage report --show-missing
+coverage html

scripts/test.sh

@@ -6,4 +6,4 @@ set -x
 # Check README.md is up to date
 python ./scripts/docs.py verify-readme
 export PYTHONPATH=./docs_src
-pytest --cov=fastapi --cov=tests --cov=docs_src --cov-report=term-missing:skip-covered --cov-report=xml tests ${@}
+coverage run -m pytest tests ${@}