Add possibility to add custom steps with attributes.

[MikDal002]

I've added possibility to add custom steps with attribute for Azure Pipelines. It is where I was using it before. I could do the same for other CIs, but I do not use them so they will need more careful review :).

I confirm that the pull-request:

• [x] Follows the contribution guidelines
• [x] Is based on my own work
• [x] Is in compliance with my employer