Swap apps to use to config_loader_mod instead of configuration_mod

[mo-rickywong]

PR Summary

Sci/Tech Reviewer: N/A technical clean-up, straight replace on lots of files
Code Reviewer: @svadams

• Reworked Configuration Namelist Access API lfric_core#175 Added a temporary wrapper "configuration_mod" around "config_mod" to limit the files affected by Reworked Configuration Namelist Access API lfric_core#175. This PR replaces the calls to the wrapper with the actual module. It affects mainly unit-tests and is the same change across a large number of files.

Code Quality Checklist

• I have performed a self-review of my own code
• My code follows the project's style guidelines
• Comments have been included that aid understanding and enhance the readability of the code
• My changes generate no new warnings
• All automated checks in the CI pipeline have completed successfully

Testing

• I have tested this change locally, using the LFRic Apps rose-stem suite
• If any tests fail (rose-stem or CI) the reason is understood and acceptable (e.g. kgo changes)
• I have added tests to cover new functionality as appropriate (e.g. system tests, unit tests, etc.)
• Any new tests have been assigned an appropriate amount of compute resource and have been allocated to an appropriate testing group (i.e. the developer tests are for jobs which use a small amount of compute resource and complete in a matter of minutes)

Test Suite Results - lfric_apps - SwapToConfigLoader/run1

Suite Information

Item	Value
Suite Name	SwapToConfigLoader/run1
Suite User	ricky.wong
Workflow Start	2026-02-25T09:46:34
Groups Run	developer

Dependency	Reference	Main Like
casim	MetOffice/casim@2025.12.1	True
jules	MetOffice/jules@69aaf4d	True
lfric_apps	MetOffice/lfric_apps@SwapToConfigLoader	False
lfric_core	MetOffice/lfric_core@2ed3e79	True
moci	MetOffice/moci@2025.12.1	True
SimSys_Scripts	MetOffice/SimSys_Scripts@2025.12.1	True
socrates	MetOffice/socrates@2025.12.1	True
socrates-spectral	MetOffice/socrates-spectral@2025.12.1	True
ukca	MetOffice/ukca@2025.12.1	True

Task Information

✅ succeeded tasks - 1168

Security Considerations

• I have reviewed my changes for potential security issues
• Sensitive data is properly handled (if applicable)
• Authentication and authorisation are properly implemented (if applicable)

Performance Impact

• Performance of the code has been considered and, if applicable, suitable performance measurements have been conducted

AI Assistance and Attribution

• Some of the content of this change has been produced with the assistance of Generative AI tool name (e.g., Met Office Github Copilot Enterprise, Github Copilot Personal, ChatGPT GPT-4, etc) and I have followed the Simulation Systems AI policy (including attribution labels)

Documentation

• Where appropriate I have updated documentation related to this change and confirmed that it builds correctly

PSyclone Approval

• If you have edited any PSyclone-related code (e.g. PSyKAl-lite, Kernel interface, optimisation scripts, LFRic data structure code) then please contact the TCD Team

Sci/Tech Review

• I understand this area of code and the changes being added
• The proposed changes correspond to the pull request description
• Documentation is sufficient (do documentation papers need updating)
• Sufficient testing has been completed

(Please alert the code reviewer via a tag when you have approved the SR)

Code Review

• All dependencies have been resolved
• Related Issues have been properly linked and addressed
• CLA compliance has been confirmed
• Code quality standards have been met
• Tests are adequate and have passed
• Documentation is complete and accurate
• Security considerations have been addressed
• Performance impact is acceptable

[mo-rickywong]

This change does alter some jedi files, a JEDI PR may be required

[ss421]

The change here does not appear to effect applications and is used by integration and unit tests only. We should not be impacted by this.

[svadams]

Straightforward changes that look fine to me. Approving for merge

[mo-rickywong]

Have brought the PR up to head to resolve the conflicts and updated the trac.log after retesting. Should be good to go.

[mo-cjsmith]

All changes made keeping the code layout clean. Code owner approves.

[mo-cjsmith]

A straightforward change.