Fix dataset attribute typo and reduce amount of categorical dataset filtering in fci_l2_nc reader

[strandgren]

This PR fixes two minor bugs introduced with the recent merge of PR1927.

1. Due to a typo in some of the L2PF filenames for the projection attribute inverse_flattening, the reader did not work properly. A temporary workaround has been implemented for the time being until the L2PF test files are correctly formatted.
2. The filtering of some categorical dataset flags has been removed as the information can be useful.

• Test modified/corrected accordingly

[codecov]

Codecov Report

Merging #2049 (dc5e03e) into main (c66368c) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #2049      +/-   ##
==========================================
+ Coverage   93.73%   93.77%   +0.03%     
==========================================
  Files         282      282              
  Lines       42080    42092      +12     
==========================================
+ Hits        39444    39472      +28     
+ Misses       2636     2620      -16     

Flag	Coverage Δ
behaviourtests	4.72% <0.00%> (-0.01%)	⬇️
unittests	94.31% <100.00%> (+0.04%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
satpy/readers/fci_l2_nc.py	99.45% <100.00%> (ø)
satpy/tests/reader_tests/test_fci_l2_nc.py	100.00% <100.00%> (ø)
satpy/readers/scmi.py	82.69% <0.00%> (-0.22%)	⬇️
satpy/readers/electrol_hrit.py	91.40% <0.00%> (-0.20%)	⬇️
satpy/readers/seviri_l1b_hrit.py	90.35% <0.00%> (-0.11%)	⬇️
satpy/readers/hrit_jma.py	97.94% <0.00%> (-0.05%)	⬇️
satpy/modifiers/angles.py	96.70% <0.00%> (ø)
satpy/readers/abi_l2_nc.py	96.00% <0.00%> (ø)
satpy/readers/goes_imager_nc.py	65.46% <0.00%> (ø)
satpy/tests/reader_tests/test_ahi_hrit.py	100.00% <0.00%> (ø)
... and 5 more

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[mraspaud]

I'm good with this, just remove the FIXME tag (you can leave the comment though)

[mraspaud]

LGTM!

[djhoese]

Can we get an updated title for this PR that describes what was done/fixed so it can be used in release notes?

[strandgren]

Can we get an updated title for this PR that describes what was done/fixed so it can be used in release notes?

Fixed. Please note that this was a bugfix for a PR merged just a couple of days ago, so it's not a bugfix wrt. the previous release.

[djhoese]

Ok thanks for the clarification and the title change. Even if it is just a fix for a previous PR it still shows up in the changelog so nice to have something descriptive.