Allow attachments to be bound to exception more easily

[fzyzcjy]

Fixs #682

[codecov-commenter]

Codecov Report

Base: 89.47% // Head: 89.46% // Decreases project coverage by -0.00% :warning:

Coverage data is based on head (47690cc) compared to base (5a6e8fc). Patch coverage: 90.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #683      +/-   ##
==========================================
- Coverage   89.47%   89.46%   -0.01%     
==========================================
  Files         106      106              
  Lines        3326     3333       +7     
==========================================
+ Hits         2976     2982       +6     
- Misses        350      351       +1     

Impacted Files	Coverage Δ
dart/lib/src/sentry_options.dart	87.50% <ø> (ø)
dart/lib/src/hub.dart	80.70% <90.00%> (+0.21%)	:arrow_up:

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

:umbrella: View full report at Codecov.
:loudspeaker: Do you have feedback about the report comment? Let us know in this issue.

[marandaneto]

https://github.com/getsentry/sentry-dart/pull/1136 is going to enable this type of feature, which is passing or removing attachments from the hint.

[marandaneto]

Closing, the new approach should use hints