use sqrtf to avoid cast to double

[braingram]

The use of sqrt from libc results in a cast to/from double in the ols_cas22 ramp fitting (with jump detection). This can result in small numerical differences that lead to romancal regtests that passed on jenkins but failed locally (due to a single extra jump in one pixel).

This PR switches sqrt for sqrtf to keep the intermediate values as float which leads to (at the moment) the same failure locally and on jenkins (where test_rampfit_step[spec_full] fails with a single pixel difference):

    {'arrays_differ': {"root['roman']['data']": {'abs_diff': <Quantity 1.9270487 DN / s>,
                                                 'n_diffs': 1,
                                                 'worst_abs_diff': {'index': (2798,
                                                                              2758),
                                                                    'value': <Quantity 1.9270487 DN / s>},

Regtest run here:
https://plwishmaster.stsci.edu:8081/job/RT/job/Roman-Developers-Pull-Requests/681/
The test_resample failure is unrelated and also occurs on main.

Checklist

• added entry in CHANGES.rst (either in Bug Fixes or Changes to API)
• updated relevant tests
• updated relevant documentation
• updated relevant milestone(s)
• added relevant label(s)

[schlafly]

Looks good to me, thank you!

[braingram]

@zacharyburnett can we squeeze this into 1.6.2? If not I'll need to update the changelog entry for this PR.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.18%. Comparing base (41259f3) to head (af5aefb).
Report is 11 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #252      +/-   ##
==========================================
- Coverage   85.90%   85.18%   -0.73%     
==========================================
  Files          35       35              
  Lines        6557     6797     +240     
==========================================
+ Hits         5633     5790     +157     
- Misses        924     1007      +83     

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[zacharyburnett]

wow what a simple fix! I'll run these through the romancal regtests on github actions too when it's merged

[braingram]

Thanks! I'd hold off re-running them until @schlafly can update the truth files. The change here only breaks jenkins in the same way as the local tests were failing (so this PR will break 2 regtests in romancal until the truth files can be updated).