Don't share the image_kwargs for dask and imageio

[quentinblampey]

PR related to the following issues:

• Separate dask_image and imageio kwargs in VisiumHD #293 - don't provide the same kwargs to dask_image.imread and imageio
• Coordinate system inconsistency in Visium HD data #295 - fix consistencies issues in the coordinate systems names. EDIT: changes reverted as fixed in another PR

[quentinblampey]

I revert the fix for the coordinate system, since @LucaMarconato you already fixed it in #303

I'll also close the corresponding issue I opened earlier. So, there is only the "separate kwargs" issue remaining

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 38.75%. Comparing base (fe474c6) to head (7c19850).
Report is 26 commits behind head on main.

Files with missing lines	Patch %	Lines
src/spatialdata_io/readers/visium_hd.py	0.00%	1 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (fe474c6) and HEAD (7c19850). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (fe474c6)	HEAD (7c19850)
	2	1

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #294       +/-   ##
===========================================
- Coverage   49.53%   38.75%   -10.78%     
===========================================
  Files          26       26               
  Lines        2709     2709               
===========================================
- Hits         1342     1050      -292     
- Misses       1367     1659      +292     

Files with missing lines	Coverage Δ
src/spatialdata_io/readers/visium_hd.py	16.66% <0.00%> (ø)

... and 7 files with indirect coverage changes

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