ref(proguard): Deobfuscate view hierarchies as part of symbolication

[loewenheim]

Depends on getsentry/symbolicator#1496.

This moves view hierarchy deobfuscation out of the plugin/preprocessor and into symbolication. That allows us to remove proguard processing from Sentry entirely and only have it in Symbolicator.

Since this means we would potentially want to send JVM events to Symbolicator that don't have exceptions or stacktraces, we have to be more lenient when detecting such events (see the change to is_jvm_event). I don't think this presents a problem—we still check if the event contains anything that needs to be symbolicated before we actually send it.

The bigger problem is that merely modifying the attachment_cache the way I'm doing right now doesn't appear to be enough to actually save the modified attachment. The current code where that happens in the preprocessor does just that, but I assume there is some point where the cache is persisted that we don't hit if we do this in symbolication. I need to understand this better. This was due to some trivial mistake or other that got fixed along the way.

[loewenheim]

Changes in this file look much worse than they are. Basically we need to make the test compatible with Symbolicator, so it needs with set_sentry_option("system.url-prefix", live_server.url): at the beginning.

[codecov]

Codecov Report

Attention: Patch coverage is 54.34783% with 21 lines in your changes missing coverage. Please review.

Project coverage is 78.15%. Comparing base (9d0b1e0) to head (63ff5ae).
Report is 190 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff            @@
##           master   #74196    +/-   ##
========================================
  Coverage   78.14%   78.15%            
========================================
  Files        6650     6650            
  Lines      297301   297042   -259     
  Branches    51186    51112    -74     
========================================
- Hits       232326   232153   -173     
+ Misses      58708    58659    -49     
+ Partials     6267     6230    -37     

Files	Coverage Δ
src/sentry/lang/java/plugin.py	100.00% <100.00%> (ø)
src/sentry/lang/java/utils.py	57.57% <100.00%> (-24.25%)	⬇️
src/sentry/lang/native/symbolicator.py	77.12% <ø> (-2.66%)	⬇️
src/sentry/lang/java/processing.py	42.07% <50.00%> (-41.67%)	⬇️

... and 121 files with indirect coverage changes