fix: Fix stripped categories in static frameworks

[noahsmartin]

This fixes a crash when using Sentry as a static framework. The linker will try to remove these @objc extensions in static frameworks because they are in a file with no other used classes. To avoid this we need to put something else in these files that get referenced from another part of the codebase. This isn't a problem for Swift, but is for objc that uses performSelector

This made me realize we don't have a CI test for sentry being used as a static framework. We should add one, but it's a bit tricky to do without SPM, that's why this is still a WIP

#skip-changelog

Closes #6134

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (main@d50a587). Learn more about missing BASE report.
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff            @@
##             main     #6125   +/-   ##
========================================
  Coverage        ?   86.658%           
========================================
  Files           ?       435           
  Lines           ?     36983           
  Branches        ?     17393           
========================================
  Hits            ?     32049           
  Misses          ?      4890           
  Partials        ?        44           

Files with missing lines	Coverage Δ
Sources/Sentry/SentrySDKInternal.m	87.096% <100.000%> (ø)
...ces/Swift/Helper/SentryApplicationExtensions.swift	20.769% <ø> (ø)
Sources/Swift/Helper/SentryProcessInfo.swift	50.000% <ø> (ø)

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[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1225.61 ms	1251.69 ms	26.08 ms
Size	23.75 KiB	969.77 KiB	946.02 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
f262e10	1226.88 ms	1250.39 ms	23.51 ms
9450cb4	1221.29 ms	1232.96 ms	11.67 ms
76f74df	1238.29 ms	1261.22 ms	22.94 ms
a3dfd57	1230.78 ms	1244.91 ms	14.14 ms
2a7868a	1226.54 ms	1256.92 ms	30.37 ms
9e6569a	1216.07 ms	1242.50 ms	26.43 ms
924de23	1222.84 ms	1248.37 ms	25.54 ms
891fd1d	1220.02 ms	1227.60 ms	7.57 ms
50a9ff7	1221.43 ms	1238.07 ms	16.64 ms
2609f7a	1218.17 ms	1241.34 ms	23.17 ms

App size

Revision	Plain	With Sentry	Diff
f262e10	23.75 KiB	913.62 KiB	889.87 KiB
9450cb4	23.75 KiB	908.55 KiB	884.80 KiB
76f74df	23.75 KiB	879.61 KiB	855.86 KiB
a3dfd57	23.75 KiB	913.63 KiB	889.87 KiB
2a7868a	23.75 KiB	880.20 KiB	856.45 KiB
9e6569a	23.75 KiB	904.54 KiB	880.79 KiB
924de23	23.75 KiB	947.54 KiB	923.79 KiB
891fd1d	23.75 KiB	919.92 KiB	896.17 KiB
50a9ff7	23.75 KiB	913.63 KiB	889.89 KiB
2609f7a	23.75 KiB	867.04 KiB	843.29 KiB

Previous results on branch: fixStaticFrameworks

Startup times

Revision	Plain	With Sentry	Diff
d1e459c	1243.37 ms	1272.83 ms	29.47 ms
2d22a60	1227.96 ms	1254.65 ms	26.69 ms
932cbbd	1233.27 ms	1258.42 ms	25.15 ms
04c83d0	1222.96 ms	1252.37 ms	29.41 ms

App size

Revision	Plain	With Sentry	Diff
d1e459c	23.75 KiB	969.86 KiB	946.12 KiB
2d22a60	23.75 KiB	969.86 KiB	946.11 KiB
932cbbd	23.75 KiB	969.78 KiB	946.03 KiB
04c83d0	23.75 KiB	969.86 KiB	946.11 KiB

[philipphofmann]

This made me realize we don't have a CI test for sentry being used as a static framework. We should add one, but it's a bit tricky to do without SPM, that's why this is still a WIP

Yes indeed.

[philipphofmann]

LGTM, when CI is green. If this crash happens frequently, we should consider adding an entry to the troubleshooting.

[noahsmartin]

Thanks @philipphofmann - Since it's only in an alpha and reported by just 1 user I'm thinking it would add more confusion that it solves to put it in the troubleshooting