Add `hermitian` argument to `calculate_eigenvalues` and `calculate_eigenvectors`

[codecov[bot]]

Codecov Report

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

Project coverage is 99.91%. Comparing base (0d9bbd2) to head (5474bff). Report is 9 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #188 +/- ## ======================================= Coverage 99.91% 99.91% ======================================= Files 12 12 Lines 1114 1114 ======================================= Hits 1113 1113 Misses 1 1 ``` | [Flag](https://app.codecov.io/gh/qiboteam/qibojit/pull/188/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/qibojit/pull/188/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiboteam) | `99.91% <ø> (ø)` | | 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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[renatomello]

@scarrazza the corresponding qibo PR was already merged, so this is ready

[scarrazza]

Thanks @renatomello