Add static check for overzealous .gitignores.

(cherry picked from commit 7ea171adca)

.github/workflows/static_checks.yml

@@ -30,6 +30,11 @@ jobs:
           sudo update-alternatives --install /usr/bin/clang-format clang-format /usr/bin/clang-format-15 100
           sudo pip3 install black==22.3.0 pygments
 
+      # This needs to happen before Python and npm execution; it must happen before any extra files are written.
+      - name: .gitignore checks (gitignore_check.sh)
+        run: |
+          bash ./misc/scripts/gitignore_check.sh
+
       - name: File formatting checks (file_format.sh)
         run: |
           bash ./misc/scripts/file_format.sh