chore(deps): update Flutter SDK (metrics) to v3.7.3

[github-actions]

Bumps metrics/flutter.properties from 3.7.1 to 3.7.3.

Auto-generated by a dependency updater.

[codecov]

Codecov Report

Base: 89.15% // Head: 89.76% // Increases project coverage by +0.61% 🎉

Coverage data is based on head (c36848b) compared to base (ef31c7f).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1278      +/-   ##
==========================================
+ Coverage   89.15%   89.76%   +0.61%     
==========================================
  Files          45      155     +110     
  Lines        1549     5032    +3483     
==========================================
+ Hits         1381     4517    +3136     
- Misses        168      515     +347     

Impacted Files	Coverage Δ
...t/lib/src/sentry_attachment/sentry_attachment.dart	100.00% <0.00%> (ø)
...t_processor/enricher/enricher_event_processor.dart	100.00% <0.00%> (ø)
dart/lib/src/sentry_transaction_context.dart	95.23% <0.00%> (ø)
dart/lib/src/protocol/sentry_user.dart	92.68% <0.00%> (ø)
dart/lib/src/protocol/max_body_size.dart	50.00% <0.00%> (ø)
...event_processor/deduplication_event_processor.dart	100.00% <0.00%> (ø)
dart/lib/src/protocol/sentry_id.dart	84.61% <0.00%> (ø)
dart/lib/src/protocol/sentry_gpu.dart	93.15% <0.00%> (ø)
dart/lib/src/protocol/sentry_event.dart	100.00% <0.00%> (ø)
dart/lib/src/protocol/sentry_operating_system.dart	100.00% <0.00%> (ø)
... and 100 more

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