Use codecov token in test_and_deploy

[K-Meech]

Description

What is this PR

• Bug fix
• Addition of a new feature
• Other

Why is this PR needed?
Codecov is still failing with Codecov: Failed to properly create commit: The process '/home/runner/work/_actions/codecov/codecov-action/v4/dist/codecov' failed with exit code 1

What does this PR do?
This PR ensures test_and_deploy is using the codecov token, as recommended in the readme for the neuroinformatics unit test action

References

For #41

How has this PR been tested?

Hopefully codecov won't error on the github actions runs for this PR

Is this a breaking change?

No

Does this PR require an update to the documentation?

No

Checklist:

• The code has been tested locally
• Tests have been added to cover all new functionality (unit & integration)
• The documentation has been updated to reflect any changes
• The code has been formatted with pre-commit

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.07%. Comparing base (13d0444) to head (3045715).
Report is 21 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #55      +/-   ##
==========================================
+ Coverage   74.55%   84.07%   +9.51%     
==========================================
  Files          25       35      +10     
  Lines         849     1331     +482     
==========================================
+ Hits          633     1119     +486     
+ Misses        216      212       -4     

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[K-Meech]

Can confirm that Codecov seems to be working correctly now - errors have disappeared on the run for this PR