Remove query to devices to get port values

[PiergiorgioButtarini]

This PR close #726.

Report to check that all is working: http://login.qrccluster.com:9000/DJxQsDoSRqKd5OgDh3KVzg==

Checklist:

• [ ] Reviewers confirm new code works as expected.
• [ ] Tests are passing.
• [ ] Coverage does not decrease.
• [ ] Documentation is updated.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (402f550) 63.03% compared to head (576eef5) 63.22%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #734 +/- ## ========================================== + Coverage 63.03% 63.22% +0.18% ========================================== Files 48 48 Lines 6623 6599 -24 ========================================== - Hits 4175 4172 -3 + Misses 2448 2427 -21 ``` | [Flag](https://app.codecov.io/gh/qiboteam/qibolab/pull/734/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiboteam) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/qiboteam/qibolab/pull/734/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiboteam) | `63.22% <ø> (+0.18%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiboteam#carryforward-flags-in-the-pull-request-comment) to find out more.

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