chore(iast): add psycopg to iast tests

[gnufede]

Checklist

• PR author has checked that all the criteria below are met
• The PR description includes an overview of the change
• The PR description articulates the motivation for the change
• The change includes tests OR the PR description describes a testing strategy
• The PR description notes risks associated with the change, if any
• Newly-added code is easy to change
• The change follows the library release note guidelines
• The change includes or references documentation updates if necessary
• Backport labels are set (if applicable)

Reviewer Checklist

• Reviewer has checked that all the criteria below are met
• Title is accurate
• All changes are related to the pull request's stated goal
• Avoids breaking API changes
• Testing strategy adequately addresses listed risks
• Newly-added code is easy to change
• Release note makes sense to a user of the library
• If necessary, author has acknowledged and discussed the performance implications of this PR as reported in the benchmarks PR comment
• Backport labels are set in a manner that is consistent with the release branch maintenance policy

[github-actions]

CODEOWNERS have been resolved as:

riotfile.py                                                             @DataDog/apm-python

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 13.91%. Comparing base (b7ca2d6) to head (c398d02).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #11569      +/-   ##
==========================================
- Coverage   14.05%   13.91%   -0.15%     
==========================================
  Files        1545     1545              
  Lines      134562   134584      +22     
==========================================
- Hits        18907    18721     -186     
- Misses     115655   115863     +208     

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