We recommend using the `bin/` executables in our docs and guides.
Let's make sure that our tests execute the same code path.

fixes #20042

In the Rails repository we use a `bin/test` executable to run our tests.
However the rerun snippets still included `bin/rails test`:

BEFORE:
```
Failed tests:

bin/rails test test/cases/adapters/postgresql/schema_test.rb:91
```

AFTER:
```
Failed tests:

bin/test test/cases/adapters/postgresql/schema_test.rb:91
```

This looks to be just out of sync tests

AppTemplate::Application.new does not run load hooks.

To load this configuration we need to use create which will 
run load hooks to load this configuration.