Fix map_coordinates errors for toroidal current equilibrium

[unalmis]

Resolves #1008

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.94%. Comparing base (104e563) to head (dabfe0a).
Report is 1557 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1009   +/-   ##
=======================================
  Coverage   94.93%   94.94%           
=======================================
  Files          87       87           
  Lines       21879    21880    +1     
=======================================
+ Hits        20771    20773    +2     
+ Misses       1108     1107    -1     

Files with missing lines	Coverage Δ
desc/equilibrium/coords.py	96.96% <100.00%> (+0.52%)	⬆️

[github-actions]

|             benchmark_name             |         dt(%)          |         dt(s)          |        t_new(s)        |        t_old(s)        | 
| -------------------------------------- | ---------------------- | ---------------------- | ---------------------- | ---------------------- |
 test_build_transform_fft_lowres         |     +0.01 +/- 5.03     | +2.76e-05 +/- 2.55e-02 |  5.06e-01 +/- 2.5e-02  |  5.06e-01 +/- 4.8e-03  |
 test_build_transform_fft_midres         |     -0.90 +/- 3.01     | -5.28e-03 +/- 1.76e-02 |  5.79e-01 +/- 1.6e-02  |  5.84e-01 +/- 7.3e-03  |
 test_build_transform_fft_highres        |     +0.31 +/- 1.88     | +3.09e-03 +/- 1.85e-02 |  9.92e-01 +/- 1.6e-02  |  9.88e-01 +/- 9.5e-03  |
 test_equilibrium_init_lowres            |     +3.56 +/- 6.22     | +1.41e-01 +/- 2.46e-01 |  4.10e+00 +/- 2.3e-01  |  3.96e+00 +/- 8.3e-02  |
 test_equilibrium_init_medres            |     +0.54 +/- 2.04     | +2.42e-02 +/- 9.07e-02 |  4.48e+00 +/- 4.8e-02  |  4.46e+00 +/- 7.7e-02  |
 test_equilibrium_init_highres           |     +1.08 +/- 4.77     | +6.77e-02 +/- 2.99e-01 |  6.32e+00 +/- 2.5e-01  |  6.25e+00 +/- 1.6e-01  |
 test_objective_compile_dshape_current   |     -0.14 +/- 2.33     | -5.28e-03 +/- 8.48e-02 |  3.63e+00 +/- 3.8e-02  |  3.64e+00 +/- 7.6e-02  |
 test_objective_compile_atf              |     -0.92 +/- 5.38     | -6.58e-02 +/- 3.86e-01 |  7.12e+00 +/- 2.1e-01  |  7.18e+00 +/- 3.2e-01  |
 test_objective_compute_dshape_current   |     -1.29 +/- 4.21     | -5.08e-05 +/- 1.66e-04 |  3.90e-03 +/- 1.3e-04  |  3.95e-03 +/- 1.1e-04  |
 test_objective_compute_atf              |     -3.73 +/- 2.39     | -6.75e-04 +/- 4.33e-04 |  1.74e-02 +/- 1.2e-04  |  1.81e-02 +/- 4.2e-04  |
 test_objective_jac_dshape_current       |     -1.19 +/- 11.50    | -5.10e-04 +/- 4.92e-03 |  4.22e-02 +/- 3.6e-03  |  4.27e-02 +/- 3.3e-03  |
 test_objective_jac_atf                  |     -0.19 +/- 2.74     | -3.60e-03 +/- 5.17e-02 |  1.88e+00 +/- 3.2e-02  |  1.89e+00 +/- 4.0e-02  |
 test_perturb_1                          |     +3.47 +/- 4.02     | +3.95e-01 +/- 4.57e-01 |  1.18e+01 +/- 1.8e-01  |  1.14e+01 +/- 4.2e-01  |
 test_perturb_2                          |     +5.37 +/- 2.76     | +8.67e-01 +/- 4.46e-01 |  1.70e+01 +/- 2.7e-01  |  1.62e+01 +/- 3.6e-01  |
 test_proximal_jac_atf                   |     +0.66 +/- 1.94     | +4.62e-02 +/- 1.35e-01 |  7.03e+00 +/- 1.1e-01  |  6.99e+00 +/- 7.8e-02  |
 test_proximal_freeb_compute             |     +1.62 +/- 0.89     | +2.07e-03 +/- 1.13e-03 |  1.30e-01 +/- 8.8e-04  |  1.28e-01 +/- 7.1e-04  |
 test_proximal_freeb_jac                 |     -0.95 +/- 3.53     | -6.78e-02 +/- 2.53e-01 |  7.10e+00 +/- 2.5e-01  |  7.16e+00 +/- 5.9e-02  |