test: run mobile integration tests in Release and Debug modes

[jpnurmi]

This PR extends the recently added mobile integration tests by adding Debug configuration alongside the existing Release configuration, to get a better understanding of the impact of:

• fix: AOT interop with managed .NET runtimes sentry-native#1392
• [WIP] fix: interop with managed .NET runtimes sentry-cocoa#6193

Notes:

• Previously, the Android integration test rebuilt the app for every test function to be able to replace {{SENTRY_DSN}} in MauiProgram.cs. With an increasing number of test functions and variations, the integration test becomes slower and slower. Thus, I changed the integration test app to simply default to http://127.0.0.1:8000, which is the default in the test server anyway. This way, we only need to build the Android app once with Release and Debug configurations, instead of 2x4=8 times.
• The test app was fixed to not auto-restart on Android. Unexpected/accidental auto-restarts caused prolonged "Waiting for app..." loops and extra envelopes.
• Client reports and automatic session tracking were disabled to ensure a predictable number of crash envelopes for test assertion purposes.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (version6@a267d32). Learn more about missing BASE report.

Additional details and impacted files

@@             Coverage Diff             @@
##             version6    #4666   +/-   ##
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  Coverage            ?   73.17%           
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  Files               ?      480           
  Lines               ?    17354           
  Branches            ?     3424           
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  Hits                ?    12699           
  Misses              ?     3806           
  Partials            ?      849           

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[jamescrosswell]

Had one small question but generally looks good!