test(nextcloud): refactor test file structure

[Leptopoda]

I hope the conventional commit types are right :)

[provokateurin]

LGTM, but I'm not sure if we should have webdav in lib/src/api and not in lib/src since it is very different from all the other apis. Not really related to this PR though as this was changed earlier already.

[Leptopoda]

I'm not sure if we should have webdav in lib/src/api

I can see your point. Let's see, where #1123 and #718 go to. Feel free to change it.

[provokateurin]

The changes to the news test should also change the paths of the fixtures 🤔

[Leptopoda]

We should add a CI that validates that.
I think a simple check that the repo didn't have any changes after the test would be enough?

[provokateurin]

I think just failing when a new fixture had to be created is good enough. Since we do not use retries anymore the failure should be propagated to the command.

[codecov]

Codecov Report

Attention: Patch coverage is 47.82609% with 24 lines in your changes missing coverage. Please review.

Project coverage is 25.23%. Comparing base (5c41a87) to head (108ae00).
Report is 4 commits behind head on main.

Files	Patch %	Lines
.../src/api/webdav/utils/xml_date_time_converter.dart	36.84%	24 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2339      +/-   ##
==========================================
+ Coverage   25.15%   25.23%   +0.08%     
==========================================
  Files         332      333       +1     
  Lines      140021   140021              
==========================================
+ Hits        35217    35336     +119     
+ Misses     104804   104685     -119     

Flag	Coverage Δ		*Carryforward flag
cookie_store	100.00% <ø> (ø)		Carriedforward from 5c41a87
dynamite	31.08% <ø> (ø)		Carriedforward from 5c41a87
dynamite_end_to_end_test	60.96% <ø> (ø)		Carriedforward from 5c41a87
dynamite_runtime	85.40% <ø> (ø)		Carriedforward from 5c41a87
neon_dashboard	96.20% <ø> (ø)
neon_framework	45.84% <ø> (ø)
neon_http_client	93.28% <ø> (ø)
neon_notifications	100.00% <ø> (ø)
neon_talk	99.46% <ø> (ø)
nextcloud	22.15% <47.82%> (+0.09%)	⬆️
sort_box	90.90% <ø> (ø)		Carriedforward from 5c41a87

*This pull request uses carry forward flags. Click here to find out more.

Files	Coverage Δ
...b/src/api/notifications/notifications_helpers.dart	81.81% <100.00%> (+69.31%)	⬆️
...src/api/notifications/notifications_helpers.g.dart	92.37% <ø> (+92.37%)	⬆️
...s/nextcloud/lib/src/api/spreed/spreed_helpers.dart	100.00% <100.00%> (+19.04%)	⬆️
...ges/nextcloud/lib/src/api/webdav/models/props.dart	62.50% <ø> (ø)
...rc/api/webdav/utils/webdav_response_converter.dart	100.00% <100.00%> (ø)
packages/nextcloud/lib/src/utils/date_time.dart	100.00% <ø> (+57.14%)	⬆️
packages/nextcloud/lib/webdav.dart	100.00% <ø> (ø)
.../src/api/webdav/utils/xml_date_time_converter.dart	36.84% <36.84%> (ø)