Provide clear and straightforward instructions for adding iOS testing devices to the Bitrise

Nobody has claimed this yet.

### What is this about?

We should have clear and straightforward instructions for adding iOS testing devices to the Bitrise allowed devices list. Additionally, we want to ensure that each device is properly configured to download and install Bitrise QA builds seamlessly.
Ensuring ease of access and understanding in this process facilitates smoother testing and development workflows.

### Scenario

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### Design

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### Technical Details

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### Threat Modeling Framework

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### Acceptance Criteria

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### Stakeholder review needed before the work gets merged

- [ ] Engineering (needed in most cases)
- [ ] Design
- [ ] Product
- [ ] QA (automation tests are required to pass before merging PRs but not all changes are covered by automation tests - please review if QA is needed beyond automation tests)
- [ ] Security
- [ ] Legal
- [ ] Marketing
- [ ] Management (please specify)
- [ ] Other (please specify)

### References

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No file, test, or entry point is identified in the issue. Start by locating the project's Bitrise configuration and existing QA-build or device documentation, then document adding iOS devices to the allowed list and configuring them to download and install QA builds. Done means the instructions are clear, complete, and usable for the stated workflow.

Written by the indexing model from the issue text.