HeatingPower objective

[ddudt]

New objective to minimize the required heating power, determined by the ISS04 energy confinement time scaling.

Also change compute quantity B0 to the name psi_r/sqrt(g)

[github-actions]

|             benchmark_name             |         dt(%)          |         dt(s)          |        t_new(s)        |        t_old(s)        | 
| -------------------------------------- | ---------------------- | ---------------------- | ---------------------- | ---------------------- |
 test_build_transform_fft_lowres         |    +10.10 +/- 7.77     | +5.15e-02 +/- 3.96e-02 |  5.62e-01 +/- 3.9e-02  |  5.10e-01 +/- 6.6e-03  |
-test_build_transform_fft_midres         |     +8.39 +/- 1.81     | +4.97e-02 +/- 1.07e-02 |  6.42e-01 +/- 9.3e-03  |  5.93e-01 +/- 5.3e-03  |
 test_build_transform_fft_highres        |     +4.23 +/- 2.06     | +4.20e-02 +/- 2.04e-02 |  1.03e+00 +/- 1.8e-02  |  9.92e-01 +/- 1.0e-02  |
 test_equilibrium_init_lowres            |     +6.93 +/- 5.51     | +2.65e-01 +/- 2.11e-01 |  4.09e+00 +/- 1.6e-01  |  3.82e+00 +/- 1.4e-01  |
-test_equilibrium_init_medres            |    +11.23 +/- 2.82     | +4.63e-01 +/- 1.16e-01 |  4.58e+00 +/- 6.2e-02  |  4.12e+00 +/- 9.9e-02  |
 test_equilibrium_init_highres           |     +1.27 +/- 8.84     | +6.96e-02 +/- 4.86e-01 |  5.57e+00 +/- 4.8e-01  |  5.50e+00 +/- 3.7e-02  |
 test_objective_compile_dshape_current   |     -0.22 +/- 0.79     | -8.41e-03 +/- 3.02e-02 |  3.81e+00 +/- 2.5e-02  |  3.82e+00 +/- 1.6e-02  |
 test_objective_compile_atf              |     -0.20 +/- 1.72     | -1.59e-02 +/- 1.35e-01 |  7.80e+00 +/- 7.7e-02  |  7.81e+00 +/- 1.1e-01  |
 test_objective_compute_dshape_current   |     -0.04 +/- 1.65     | -1.31e-06 +/- 5.72e-05 |  3.46e-03 +/- 4.0e-05  |  3.46e-03 +/- 4.1e-05  |
 test_objective_compute_atf              |     -0.80 +/- 1.75     | -8.23e-05 +/- 1.80e-04 |  1.02e-02 +/- 1.5e-04  |  1.03e-02 +/- 1.0e-04  |
 test_objective_jac_dshape_current       |     +5.26 +/- 7.91     | +2.03e-03 +/- 3.05e-03 |  4.06e-02 +/- 2.3e-03  |  3.85e-02 +/- 2.0e-03  |
 test_objective_jac_atf                  |     +3.41 +/- 3.43     | +6.32e-02 +/- 6.36e-02 |  1.92e+00 +/- 4.7e-02  |  1.86e+00 +/- 4.3e-02  |
 test_perturb_1                          |     +0.47 +/- 1.03     | +5.67e-02 +/- 1.25e-01 |  1.22e+01 +/- 8.9e-02  |  1.21e+01 +/- 8.8e-02  |
 test_perturb_2                          |     -0.04 +/- 1.02     | -6.86e-03 +/- 1.74e-01 |  1.70e+01 +/- 1.2e-01  |  1.71e+01 +/- 1.2e-01  |
 test_proximal_jac_atf                   |     -0.54 +/- 1.18     | -4.41e-02 +/- 9.63e-02 |  8.11e+00 +/- 6.9e-02  |  8.15e+00 +/- 6.7e-02  |
 test_proximal_freeb_compute             |     +0.96 +/- 0.84     | +1.73e-03 +/- 1.52e-03 |  1.83e-01 +/- 9.7e-04  |  1.81e-01 +/- 1.2e-03  |
 test_proximal_freeb_jac                 |     -0.24 +/- 1.37     | -1.77e-02 +/- 1.02e-01 |  7.41e+00 +/- 9.1e-02  |  7.43e+00 +/- 4.6e-02  |
 test_solve_fixed_iter                   |     +0.51 +/- 60.02    | +2.55e-02 +/- 2.98e+00 |  4.99e+00 +/- 2.1e+00  |  4.96e+00 +/- 2.1e+00  |

[codecov]

Codecov Report

Attention: Patch coverage is 94.69027% with 6 lines in your changes missing coverage. Please review.

Project coverage is 95.42%. Comparing base (4281a96) to head (07366ef).
Report is 36 commits behind head on master.

Files	Patch %	Lines
desc/objectives/_confinement.py	88.67%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1168      +/-   ##
==========================================
- Coverage   95.42%   95.42%   -0.01%     
==========================================
  Files          89       90       +1     
  Lines       22493    22576      +83     
==========================================
+ Hits        21464    21543      +79     
- Misses       1029     1033       +4     

Files	Coverage Δ
desc/compute/_equil.py	100.00% <100.00%> (ø)
desc/compute/_field.py	100.00% <100.00%> (ø)
desc/compute/_omnigenity.py	99.21% <100.00%> (ø)
desc/compute/_profiles.py	99.17% <100.00%> (+0.02%)	⬆️
desc/objectives/__init__.py	100.00% <100.00%> (ø)
desc/plotting.py	95.81% <ø> (ø)
desc/objectives/_confinement.py	88.67% <88.67%> (ø)

... and 2 files with indirect coverage changes

[ddudt]

Changed the density to use the volume-average instead of a line-average and updated the master compute data, so this PR should be good to go now