Feature/labs column - Adds lab_unit column in routine csv

[pascagihozo]

Pull Requests Requirements

• [ x] The PR title includes a brief description of the work done, including the
  Issue number if applicable.
• The PR includes a video showing the changes for the work done.
• [ x] The PR title follows conventional commit label standards.
• The changes confirm to the OpenElis Global x3 Styleguide and design
  documentation.
• The changes include tests or are validated by existing tests.
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Summary

1. Added the lab_unit column definition
2. Created the proper SQL subquery to get the test section name

Screenshots

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Related Issue

Missing Lab Unit in Routine CSV File:

[Add a link to the related issue or mention it here if applicable]

Other

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[github-actions]

👋 Hi, @pascagihozo,
Conflicts have been detected against the base branch. Please rebase your branch against the base branch.

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This message is automatically generated by prince-chrismc/label-merge-conflicts-action so don't hesitate to report issues/improvements there.

[mozzy11]

Changes implemented here #1383