feat: add threshold to always log fatal logs

[philprime]

📜 Description

Introduces a new constant in SentryLog to configure a log level that will always be logged.

💡 Motivation and Context

Closes #4467

💚 How did you test it?

I added a statement SENTRY_LOG_FATAL(@"test") in the SDK install code and checked if it gets printed.

📝 Checklist

You have to check all boxes before merging:

• 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.
• I updated the wizard 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

none

[github-actions]

	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Generated by 🚫 dangerJS against 43329a1

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.207%. Comparing base (6b973b2) to head (43329a1).
Report is 4 commits behind head on main.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #4707       +/-   ##
=============================================
+ Coverage   91.149%   91.207%   +0.057%     
=============================================
  Files          623       624        +1     
  Lines        71759     72095      +336     
  Branches     25950     26227      +277     
=============================================
+ Hits         65408     65756      +348     
+ Misses        6257      6240       -17     
- Partials        94        99        +5     

Files with missing lines	Coverage Δ
Sources/Swift/Tools/SentryLog.swift	74.468% <100.000%> (+3.736%)	⬆️
Tests/SentryTests/Helper/SentryLogTests.swift	100.000% <100.000%> (ø)

... and 61 files with indirect coverage changes

---

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[brustolin]

LGTM

I will leave the guard thing to your best judgement.

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1228.53 ms	1252.54 ms	24.01 ms
Size	22.31 KiB	768.52 KiB	746.21 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
b695b61	1221.71 ms	1249.18 ms	27.47 ms
0589699	1243.25 ms	1252.60 ms	9.35 ms
3ea21f5	1250.80 ms	1258.88 ms	8.08 ms
407ff99	1190.89 ms	1237.18 ms	46.29 ms
904d7fa	1225.73 ms	1249.22 ms	23.49 ms
c471221	1224.16 ms	1241.59 ms	17.43 ms
1928267	1200.94 ms	1227.17 ms	26.23 ms
09311b6	1238.67 ms	1255.04 ms	16.37 ms
ed49f0c	1215.94 ms	1245.63 ms	29.69 ms
973d574	1240.86 ms	1255.83 ms	14.98 ms

App size

Revision	Plain	With Sentry	Diff
b695b61	21.90 KiB	707.65 KiB	685.75 KiB
0589699	21.58 KiB	656.60 KiB	635.02 KiB
3ea21f5	22.84 KiB	402.63 KiB	379.78 KiB
407ff99	20.76 KiB	427.86 KiB	407.10 KiB
904d7fa	20.76 KiB	432.87 KiB	412.11 KiB
c471221	22.85 KiB	413.89 KiB	391.04 KiB
1928267	22.30 KiB	730.78 KiB	708.47 KiB
09311b6	21.58 KiB	654.67 KiB	633.09 KiB
ed49f0c	21.58 KiB	632.13 KiB	610.55 KiB
973d574	21.58 KiB	542.38 KiB	520.80 KiB