Add config.ddev-drupal-core-dev.yaml from waiting PR

This is part of justafish#31

Rebase will be required when that goes in.

Author: rfay

config.ddev-drupal-core-dev.yaml

@@ -0,0 +1,10 @@
+# #ddev-generated
+# This file is placed by the justafish/ddev-drupal-core-dev addon.
+
+webimage_extra_packages: ["chromium-driver"]
+ddev_version_constraint: '>=v1.23.0'
+upload_dirs:
+  # The install technique tries to remove all of sites/default/files
+  # but with DDEV + mutagen that isn't possible.
+  # so just redirect the upload_dirs.
+  - .ddev/tmp

install.yaml

@@ -4,6 +4,7 @@ name: ddev-drupal-core-dev
 
 project_files:
   - web-build/Dockerfile
+  - config.ddev-drupal-core-dev.yaml
   - docker-compose.core-dev-selenium.yaml
   - core-dev/phpunit-firefox.xml
   - core-dev/phpunit-chrome.xml