Option to access context from `makeAddPgTableOrderByPlugin`

[hos]

Feature description

When adding order by plugin using makeAddPgTableOrderByPlugin, we call steps other than the one passed as first argument to the orderByAscDesc.

Motivating example

We access locale from the context().get('locale') to translate some resources and we need to order by the translation not the original value.

Here is an example of usage
https://github.com/hos/ouch-my-finger/tree/cant-access-steps-in-order-by-plugin

Breaking changes

Supporting development

I [tick all that apply]:

• am interested in building this feature myself
• am interested in collaborating on building this feature
• am willing to help testing this feature before it's released
• am willing to write a test-driven test suite for this feature (before it exists)
• am a Graphile sponsor ❤️
• have an active support or consultancy contract with Graphile