ci: Make CodeCov checks informational

CodeCov needs some additional configuration to be useful with the monorepo. Setting checks to informational will prevent them from failing the build until we get CodeCov working properly.

codecov.yml

@@ -16,6 +16,10 @@ coverage:
         target: auto  # target coverage is equal to the PR base
         threshold: 0% # coverage is not allowed to reduce vs. the PR base
         base: auto
+        informational: true
+    project:
+      default:
+        informational: true
 flag_management:
   # Note: flags should have the same name as the circleci job in which they
   # are uploaded.