Merge pull request rails#51135 from yahonda/allow_ubuntu_default-mysql-client

Address `ApplicationTests::FrameworksTest` failure on Ubuntu 22.04

Author: yahonda

railties/test/application/initializers/frameworks_test.rb

@@ -282,7 +282,7 @@ def show
             end
           end
 
-          assert_match(/Failed to validate the schema cache because of ActiveRecord::ConnectionNotEstablished/, error)
+          assert_match(/Failed to validate the schema cache because of ActiveRecord::(ConnectionNotEstablished|DatabaseConnectionError)/, error)
         end
       end
     end