Ensure CoilCurvature and CoilTorsion are resolution independent

[singh-jaydeep]

Resolves #2301 by replacing quad_weights with their square roots for these objectives. Also strengthens the resolution independence test for coil objectives.

[github-actions]

Memory benchmark result

|               Test Name                |      %Δ      |    Master (MB)     |      PR (MB)       |    Δ (MB)    |    Time PR (s)     |  Time Master (s)   |
| -------------------------------------- | ------------ | ------------------ | ------------------ | ------------ | ------------------ | ------------------ |
  test_objective_jac_w7x                 |   -0.15 %    |     4.235e+03      |     4.228e+03      |    -6.44     |       24.32        |       23.56        |
  test_proximal_jac_w7x_with_eq_update   |   -0.13 %    |     6.863e+03      |     6.854e+03      |    -8.76     |       120.24       |       120.21       |
  test_proximal_freeb_jac                |    0.04 %    |     1.354e+04      |     1.354e+04      |     5.11     |       66.33        |       65.14        |
  test_proximal_freeb_jac_blocked        |    0.05 %    |     7.898e+03      |     7.902e+03      |     3.69     |       56.36        |       56.35        |
  test_proximal_freeb_jac_batched        |   -0.14 %    |     7.880e+03      |     7.869e+03      |    -10.72    |       55.18        |       58.05        |
  test_proximal_jac_ripple               |    0.38 %    |     3.759e+03      |     3.773e+03      |    14.38     |       41.02        |       43.17        |
  test_proximal_jac_ripple_bounce1d      |    0.08 %    |     3.978e+03      |     3.982e+03      |     3.25     |       52.97        |       54.98        |
  test_eq_solve                          |   -0.65 %    |     1.839e+03      |     1.827e+03      |    -11.97    |       41.07        |       42.55        |
  test_objective_quadratic_flux_jac      |    0.07 %    |     1.891e+03      |     1.892e+03      |     1.39     |       28.32        |       29.98        |

For the memory plots, go to the summary of Memory Benchmarks workflow and download the artifact.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.35%. Comparing base (187e98e) to head (94304f7).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2302      +/-   ##
==========================================
+ Coverage   94.34%   94.35%   +0.01%     
==========================================
  Files         101      101              
  Lines       29042    29042              
==========================================
+ Hits        27400    27403       +3     
+ Misses       1642     1639       -3     

Files with missing lines	Coverage Δ
desc/objectives/_coils.py	99.34% <100.00%> (ø)

... and 2 files with indirect coverage changes

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[dpanici]

Can you also rerun the coil optimization notebook? Just so that they are up to date with master in case any minor changes have occurred