refactor(nextcloud)!: Return raw response in WebDAV proppatch

[provokateurin]

Necessary refactor for #718

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 28.66%. Comparing base (76fff24) to head (ea1b5f7).
Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2563      +/-   ##
==========================================
- Coverage   28.66%   28.66%   -0.01%     
==========================================
  Files         366      366              
  Lines      136296   136293       -3     
==========================================
- Hits        39076    39073       -3     
  Misses      97220    97220              

Flag	Coverage Δ		*Carryforward flag
account_repository	98.76% <ø> (ø)
cookie_store	99.48% <ø> (ø)		Carriedforward from 76fff24
dashboard_app	96.05% <ø> (ø)
dynamite	31.05% <ø> (ø)		Carriedforward from 76fff24
dynamite_end_to_end_test	61.69% <ø> (ø)		Carriedforward from 76fff24
dynamite_runtime	85.40% <ø> (ø)		Carriedforward from 76fff24
interceptor_http_client	97.18% <ø> (ø)		Carriedforward from 76fff24
neon_dashboard	96.05% <ø> (ø)		Carriedforward from 76fff24
neon_framework	59.20% <ø> (ø)
neon_http_client	97.50% <ø> (ø)
neon_notifications	100.00% <ø> (ø)		Carriedforward from 76fff24
neon_storage	94.66% <ø> (ø)
neon_talk	99.45% <ø> (ø)		Carriedforward from 76fff24
nextcloud	24.26% <100.00%> (-0.01%)	⬇️
notifications_app	97.40% <ø> (ø)
notifications_push_repository	98.59% <ø> (ø)
sort_box	90.90% <ø> (ø)		Carriedforward from 76fff24
talk_app	98.94% <ø> (ø)

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

Files with missing lines	Coverage Δ
...es/nextcloud/lib/src/api/webdav/webdav_client.dart	94.59% <100.00%> (-0.09%)	⬇️