RCAL-567 Update unit tests to add tmpdir for test files

[ddavis-stsci]

Resolves RCAL-567

Closes #

This PR updates unit tests to add tmpdir for test files.
Unit tests
pytest /Users/ddavis/src/Roman/romancal/romancal/associations/tests/
=================================================================== test session starts ===================================================================
platform darwin -- Python 3.11.0, pytest-7.3.1, pluggy-1.0.0
rootdir: /Users/ddavis/src/Roman/romancal
configfile: pyproject.toml
...
============================================================== 55 passed, 1 skipped in 0.98s
ls *.json
ls: *.json: No such file or directory

pytest /Users/ddavis/src/Roman/romancal/romancal/tweakreg/tests/
=================================================================== test session starts ===================================================================
platform darwin -- Python 3.11.0, pytest-7.3.1, pluggy-1.0.0
rootdir: /Users/ddavis/src/Roman/romancal
configfile: pyproject.toml
plugins: remotedata-0.4.0, hypothesis-6.75.1, asdf-2.15.0, mock-3.10.0, filter-subpackage-0.1.2, astropy-header-0.2.2, doctestplus-0.12.1, astropy-0.10.0, cov-4.0.0, ci-watson-0.6.1, openfiles-0.5.0, arraydiff-0.5.0
collected 94 items

../../../romancal/romancal/tweakreg/tests/test_astrometric_utils.py ....................................... [ 41%]
../../../romancal/romancal/tweakreg/tests/test_tweakreg.py ....................................................... [100%]
...
-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
======================================================== 94 passed, 6 warnings in 73.33s (0:01:13) ========================================================
(rcal_python311) bash>ls ref_cat.escv
ls: ref_cat.escv: No such file or directory

Checklist

• added entry in CHANGES.rst under the corresponding subsection
• updated relevant tests
• [N/A] updated relevant documentation
• updated relevant milestone(s)
• added relevant label(s)

[codecov]

Codecov Report

Patch coverage: 30.00% and project coverage change: -0.20 ⚠️

Comparison is base (b02786e) 77.61% compared to head (5ad9de2) 77.41%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #702      +/-   ##
==========================================
- Coverage   77.61%   77.41%   -0.20%     
==========================================
  Files          82       82              
  Lines        4315     4322       +7     
==========================================
- Hits         3349     3346       -3     
- Misses        966      976      +10     

Flag	Coverage Δ		*Carryforward flag
nightly	64.53% <ø> (ø)		Carriedforward from b02786e

*This pull request uses carry forward flags. Click here to find out more.

Impacted Files	Coverage Δ
romancal/associations/main.py	81.76% <30.00%> (-5.74%)	⬇️

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