ASGI lifespan failure on exception

[ahopkins]

Closes #2392

[codecov]

Codecov Report

Base: 88.489% // Head: 88.532% // Increases project coverage by +0.043% 🎉

Coverage data is based on head (51f715e) compared to base (95ee518).
Patch coverage: 100.000% of modified lines in pull request are covered.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #2627       +/-   ##
=============================================
+ Coverage   88.489%   88.532%   +0.043%     
=============================================
  Files           81        81               
  Lines         6698      6706        +8     
  Branches      1143      1143               
=============================================
+ Hits          5927      5937       +10     
  Misses         531       531               
+ Partials       240       238        -2     

Impacted Files	Coverage Δ
sanic/asgi.py	92.307% <100.000%> (+2.143%)	⬆️

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