Setting lephare config from stage params

[raphaelshirley]

Waiting for other PRs to merge before merging to ensure config values consistent with updated string dict format

Closes #43

I want to wait for the lephare string dict changes and the COSMOS param defaults to merged before merging to ensure merge conflicts are handled correctly

Problem & Solution Description (including issue #)

The redshift grid was being read from the lepahre config which could be distinct from the stage params and cause a confusion. WE instead overwrite the lephare config from the params. This should allow the notebook to be sped up by setting a sparse redshift grid in the inform params.

Code Quality

• [x] My code follows the code style of this project
• [x] I have written unit tests or justified all instances of #pragma: no cover; in the case of a bugfix, a new test that breaks as a result of the bug has been added
• [x] My code contains relevant comments and necessary documentation for future maintainers; the change is reflected in applicable demos/tutorials (with output cleared!) and added/updated docstrings use the NumPy docstring format
• [ ] Any breaking changes, described above, are accompanied by backwards compatibility and deprecation warnings

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 58.33333% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 49.61%. Comparing base (8b60454) to head (2d33944). Report is 6 commits behind head on main.

:exclamation: Current head 2d33944 differs from pull request most recent head f9d7ad0

Please upload reports for the commit f9d7ad0 to get more accurate results.

Files	Patch %	Lines
src/rail/estimation/algos/lephare.py	58.33%	5 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #47 +/- ## ========================================== + Coverage 47.15% 49.61% +2.46% ========================================== Files 2 2 Lines 123 131 +8 ========================================== + Hits 58 65 +7 - Misses 65 66 +1 ```

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