exclude config.py from diff-cover as well (#17873)

* debug

* exclude `config.py` from diff-cover as well

* actually pass the config path...

* Revert "debug"

This reverts commit 863989f.

* just `*`

* Revert "Revert "debug""

This reverts commit 0855bc7.

* leading `*/`?

* Revert "leading `*/`?"

This reverts commit 5067869.

* Revert "Revert "leading `*/`?""

This reverts commit 5f09e62.

* Revert "Revert "Revert "debug"""

This reverts commit a788ec1.

.diffcover.toml

@@ -0,0 +1,4 @@
+[tool.diff_cover]
+exclude = [
+    "*/chia/_tests/*/config.py",
+]

.github/workflows/test.yml

@@ -226,7 +226,7 @@ jobs:
         env:
           compare-branch: ${{ github.base_ref == '' && github.event.before || format('origin/{0}', github.base_ref) }}
         run: |
-          diff-cover --compare-branch=${{ env.compare-branch }} --fail-under=100 --html-report=coverage-reports/diff-cover.html --markdown-report=coverage-reports/diff-cover.md coverage-reports/coverage.xml | tee coverage-reports/diff-cover-stdout
+          diff-cover --config-file=.diffcover.toml --compare-branch=${{ env.compare-branch }} --fail-under=100 --html-report=coverage-reports/diff-cover.html --markdown-report=coverage-reports/diff-cover.md coverage-reports/coverage.xml | tee coverage-reports/diff-cover-stdout
           COV_STATUS="${PIPESTATUS[0]}"
           echo "COV_STATUS=$COV_STATUS" >> "$GITHUB_ENV"
           if [[ $COV_STATUS != '0' && "$GITHUB_BASE_REF" != '' ]]; then