BUG: fix plot bounds for slices in cylindrical coordinates

[neutrinoceros]

PR Summary

Reutilizing some bits from #3533, fix #3819
Opening as a draft because there's a secondary problem to solve. Namely, axes ticks are incorrect (0, 0) should always be the origin, not the display center

import numpy as np
import yt
from yt.testing import fake_amr_ds, add_noise_fields

shape = (32, 64, 128)
ds = yt.load_uniform_grid(
    {},
    shape,
    bbox=np.array([[1, 5], [0.1, np.pi / 2 - 0.1], [0, 1]]),
    geometry="polar",
)
add_noise_fields(ds)
p = yt.SlicePlot(ds, "z", "noise1")
p.save("/tmp/")

[neutrinoceros]

Solved the secondary issue in a second commit. Now I get:

[neutrinoceros]

Also addressed my second comment in the original issue
#3819 (comment)

Bonus: also fixed the axis label ('theta' -> 'θ')

[matthewturk]

This is a good fix to an annoying problem! Thanks, @neutrinoceros

[neutrinoceros]

@matthewturk any reason not to merge this yet ?

[lumberbot-app]

Owee, I'm MrMeeseeks, Look at me.

There seem to be a conflict, please backport manually. Here are approximate instructions:

1. Checkout backport branch and update it.

git checkout yt-4.0.x
git pull

2. Cherry pick the first parent branch of the this PR on top of the older branch:

git cherry-pick -m1 ef08989d8222e7172751d17009959102db05dd20

3. You will likely have some merge/cherry-pick conflict here, fix them and commit:

git commit -am 'Backport PR #3820: BUG: fix plot bounds for slices in cylindrical coordinates'

4. Push to a named branch:

git push YOURFORK yt-4.0.x:auto-backport-of-pr-3820-on-yt-4.0.x

5. Create a PR against branch yt-4.0.x, I would have named this PR:

"Backport PR #3820 on branch yt-4.0.x (BUG: fix plot bounds for slices in cylindrical coordinates)"

And apply the correct labels and milestones.

Congratulations — you did some good work! Hopefully your backport PR will be tested by the continuous integration and merged soon!

Remember to remove the Still Needs Manual Backport label once the PR gets merged.

If these instructions are inaccurate, feel free to suggest an improvement.