fix: Use proper application state before sending an event

[bguidolim]

📜 Description

Replaced source of truth for app state from SentryAppStateManager instance to SentryUIApplication.

💡 Motivation and Context

This change is required since it's sending wrong value to for all events in an UIKit application.
This PR fixes #3991

💚 How did you test it?

Existing unit tests pass

📝 Checklist

You have to check all boxes before merging:

• I reviewed the submitted code.
• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.

🔮 Next steps

[philipphofmann]

Thanks a lot, @bguidolim. Please add some tests in SentryClient for that. Then we can merge this.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.889%. Comparing base (b11cd87) to head (cfb9197).
Report is 1 commits behind head on main.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #4005       +/-   ##
=============================================
+ Coverage   90.863%   90.889%   +0.025%     
=============================================
  Files          593       594        +1     
  Lines        46506     46647      +141     
  Branches     16624     16688       +64     
=============================================
+ Hits         42257     42397      +140     
- Misses        4067      4069        +2     
+ Partials       182       181        -1     

Files	Coverage Δ
Sources/Sentry/SentryClient.m	98.341% <100.000%> (+2.369%)	⬆️
Tests/SentryTests/SentryClientTests.swift	97.444% <100.000%> (+0.090%)	⬆️

... and 16 files with indirect coverage changes

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[bguidolim]

Hey @philipphofmann

Do I need to do something regarding the failed checks?
It seems it's out of my control.

[philipphofmann]

LGTM, thanks 💯

[philipphofmann]

Do I need to do something regarding the failed checks? It seems it's out of my control.

No action is required. That's out of your control.