text: Title: add optional text to approval steps
  Body: ### Please confirm the following
  
  - [X] I agree to follow this project's [code of conduct](https://docs.ansible.com/ansible/latest/community/code_of_conduct.html).
  - [X] I have checked the [current issues](https://github.com/ansible/awx/issues) for duplicates.
  - [X] I understand that AWX is open source software provided for free and that I might not receive a timely response.
  
  ### Feature type
  
  Enhancement to Existing Feature
  
  ### Feature Summary
  
  it would be great if the user could motivate rejection /approval in the approval steps of workflow. at its simplest this would be an optional text area where the user can input text that would then populate an artifact within the workflow, to be used in further steps
  
  ### Select the relevant components
  
  - [X] UI
  - [ ] API
  - [ ] Docs
  - [ ] Collection
  - [ ] CLI
  - [ ] Other
  
  ### Steps to reproduce
  
  ..
  
  ### Current results
  
  ..
  
  ### Sugested feature result
  
  ..
  
  ### Additional information
  
  _No response_