fix(nextcloud)!: Revert request body usage for non-PUT/POST/PATCH requests

[provokateurin]

#2129
#2305

While the change is technically not breaking because the previous change wasn't released yet, this makes it easier to find the change in the changelog and understand what has happened.

[Leptopoda]

LGTM
Is there a reason for this still being a draft?

[provokateurin]

CI was failing because I only adjusted the nextcloud tests and not the bloc tests

[codecov]

Codecov Report

Attention: Patch coverage is 15.64792% with 345 lines in your changes missing coverage. Please review.

Project coverage is 25.46%. Comparing base (da4bff1) to head (52f868d).
Report is 3 commits behind head on main.

Files	Patch %	Lines
...b/src/api/files_sharing/files_sharing.openapi.dart	6.45%	87 Missing ⚠️
...api/provisioning_api/provisioning_api.openapi.dart	6.66%	56 Missing ⚠️
...nextcloud/lib/src/api/theming/theming.openapi.dart	12.50%	42 Missing ⚠️
...i/provisioning_api/provisioning_api.openapi.g.dart	0.00%	30 Missing ⚠️
...src/api/files_trashbin/files_trashbin.openapi.dart	6.66%	28 Missing ⚠️
...s/nextcloud/lib/src/api/tables/tables.openapi.dart	0.00%	19 Missing ⚠️
...src/api/files_sharing/files_sharing.openapi.g.dart	0.00%	18 Missing ⚠️
...xtcloud/lib/src/api/theming/theming.openapi.g.dart	0.00%	18 Missing ⚠️
...src/api/files_versions/files_versions.openapi.dart	0.00%	16 Missing ⚠️
...cloud/lib/src/api/user_ldap/user_ldap.openapi.dart	12.50%	14 Missing ⚠️
... and 3 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2352      +/-   ##
==========================================
+ Coverage   25.23%   25.46%   +0.23%     
==========================================
  Files         333      333              
  Lines      140016   134828    -5188     
==========================================
- Hits        35331    34336     -995     
+ Misses     104685   100492    -4193     

Flag	Coverage Δ		*Carryforward flag
cookie_store	100.00% <ø> (ø)		Carriedforward from da4bff1
dynamite	31.08% <ø> (ø)		Carriedforward from da4bff1
dynamite_end_to_end_test	60.96% <ø> (ø)		Carriedforward from da4bff1
dynamite_runtime	85.40% <ø> (ø)		Carriedforward from da4bff1
neon_dashboard	96.05% <100.00%> (-0.15%)	⬇️
neon_framework	45.81% <100.00%> (-0.04%)	⬇️
neon_http_client	93.28% <ø> (ø)
neon_notifications	100.00% <ø> (ø)
neon_talk	99.45% <100.00%> (-0.01%)	⬇️
nextcloud	22.29% <12.65%> (+0.14%)	⬆️
sort_box	90.90% <ø> (ø)		Carriedforward from da4bff1

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

Files	Coverage Δ
...s/neon/neon_dashboard/lib/src/blocs/dashboard.dart	100.00% <100.00%> (ø)
packages/neon/neon_talk/lib/src/blocs/room.dart	98.52% <100.00%> (-0.09%)	⬇️
.../neon/neon_talk/lib/src/widgets/message_input.dart	98.56% <100.00%> (-0.04%)	⬇️
...talk/lib/src/widgets/rich_object/file_preview.dart	100.00% <100.00%> (ø)
...s/neon_framework/lib/src/blocs/unified_search.dart	100.00% <100.00%> (ø)
...es/neon_framework/lib/src/testing/mock_server.dart	91.66% <100.00%> (ø)
...s/neon_framework/lib/src/widgets/autocomplete.dart	100.00% <100.00%> (+2.27%)	⬆️
...kages/nextcloud/lib/src/api/core/core.openapi.dart	45.44% <ø> (+0.07%)	⬆️
...ges/nextcloud/lib/src/api/core/core.openapi.g.dart	29.21% <ø> (+0.04%)	⬆️
...cloud/lib/src/api/dashboard/dashboard.openapi.dart	86.61% <100.00%> (+1.63%)	⬆️
... and 21 more

... and 7 files with indirect coverage changes