fix(neon_framework): Catch exceptions when parsing Expires header in RequestManager

[provokateurin]

Saw a Parsing timezone can not be done unambiguously. flying by, but unfortunately there was no log which value was causing this.
If it happens we are fine to ignore it, since it's only caching that might not work as intended, but we can still log the error.

[codecov]

Codecov Report

Attention: Patch coverage is 25.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 29.07%. Comparing base (0ad5dae) to head (111fd4f).
Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
.../neon_framework/lib/src/utils/request_manager.dart	25.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2832      +/-   ##
==========================================
- Coverage   29.07%   29.07%   -0.01%     
==========================================
  Files         373      373              
  Lines      138403   138406       +3     
==========================================
  Hits        40243    40243              
- Misses      98160    98163       +3     

Flag	Coverage Δ		*Carryforward flag
account_repository	98.47% <ø> (ø)
cookie_store	99.48% <ø> (ø)		Carriedforward from 0ad5dae
dashboard_app	96.05% <ø> (ø)
dynamite	31.05% <ø> (ø)		Carriedforward from 0ad5dae
dynamite_end_to_end_test	61.79% <ø> (ø)		Carriedforward from 0ad5dae
dynamite_runtime	85.40% <ø> (ø)		Carriedforward from 0ad5dae
interceptor_http_client	97.18% <ø> (ø)		Carriedforward from 0ad5dae
neon_dashboard	96.05% <ø> (ø)		Carriedforward from 0ad5dae
neon_framework	59.27% <25.00%> (-0.06%)	⬇️
neon_http_client	93.61% <ø> (ø)		Carriedforward from 0ad5dae
neon_notifications	100.00% <ø> (ø)		Carriedforward from 0ad5dae
neon_rich_text	100.00% <ø> (ø)
neon_storage	94.66% <ø> (ø)		Carriedforward from 0ad5dae
neon_talk	99.45% <ø> (ø)		Carriedforward from 0ad5dae
nextcloud	24.57% <ø> (ø)		Carriedforward from 0ad5dae
notifications_app	97.36% <ø> (ø)
notifications_push_repository	98.11% <ø> (ø)
sort_box	90.90% <ø> (ø)		Carriedforward from 0ad5dae
talk_app	98.84% <ø> (ø)

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

Files with missing lines	Coverage Δ
.../neon_framework/lib/src/utils/request_manager.dart	74.69% <25.00%> (-2.81%)	⬇️