python framework: Get rid of steps_ functions

Everyone hates these. They make it hard to write tests because the instructions are separate from the code. This was put in place originally because the TH team wanted to be able to determine what the test steps were before the test started, but they're not actually CALLING these methods, so this is useless anyway.

We need to find a way to move the test steps into the test itself and ideally to maintain the ability to extract the test steps out to an adoc file.

I would argue that given that some tests ALREADY lazy-load the test steps, the best solution here is to re-negotiate the requirements from the TH team and provide the test steps in the runner hooks. This work will require some front-end work, that the TH team cannot do themselves. You will need to work with the TH team and the ATLs to understand what is necessary and what is a nice-to-have.