Chore: Move SentryUserFeedbackIntegration initialization.

[brustolin]

Integrations should be initialized in the defaultIntegrations property of the options.

Is there any reason to handle this differently for UserFeedback, @armcknight?

#skip-changelog

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1220.46 ms	1247.65 ms	27.19 ms
Size	22.30 KiB	730.78 KiB	708.48 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
b11cd87	1234.51 ms	1250.52 ms	16.01 ms
5b14b06	1196.33 ms	1227.00 ms	30.67 ms
aa4eddf	1228.21 ms	1236.72 ms	8.51 ms
a4ee85b	1227.57 ms	1232.32 ms	4.75 ms
4d3df92	1245.35 ms	1259.58 ms	14.23 ms
e8b11f8	1233.66 ms	1249.74 ms	16.08 ms
6161814	1216.90 ms	1233.18 ms	16.29 ms
742d4b6	1217.04 ms	1229.38 ms	12.33 ms
2124551	1231.78 ms	1264.94 ms	33.16 ms
ecd9ecd	1215.77 ms	1238.70 ms	22.93 ms

App size

Revision	Plain	With Sentry	Diff
b11cd87	21.58 KiB	631.86 KiB	610.28 KiB
5b14b06	22.84 KiB	402.56 KiB	379.72 KiB
aa4eddf	21.58 KiB	544.86 KiB	523.28 KiB
a4ee85b	20.76 KiB	434.92 KiB	414.16 KiB
4d3df92	22.85 KiB	413.45 KiB	390.60 KiB
e8b11f8	22.85 KiB	411.92 KiB	389.07 KiB
6161814	21.58 KiB	713.97 KiB	692.39 KiB
742d4b6	21.58 KiB	546.19 KiB	524.61 KiB
2124551	22.85 KiB	411.69 KiB	388.84 KiB
ecd9ecd	20.76 KiB	420.23 KiB	399.47 KiB

Previous results on branch: chore/move-sentryfeedback-startup

Startup times

Revision	Plain	With Sentry	Diff
de31158	1214.08 ms	1231.51 ms	17.43 ms

App size

Revision	Plain	With Sentry	Diff
de31158	22.30 KiB	730.79 KiB	708.49 KiB

[armcknight]

Hmm, the reason I put this here is that I saw defaultIntegrations (which calls defaultIntegrationClasses) called in SentryOptions init, and assumed that was the only time that list would be accessed, which is too early to determine if user feedback is configured or not. But I see now that defaultIntegrationClasses is called again in SentrySDK.startWithOptions, which will have the options configured by then.

In what case would the version of defaultIntegrationClasses be used that is accessed here instead of the later result? Is it always overwritten, or just in some cases?

sentry-cocoa/Sources/Sentry/SentryOptions.m

Line 100 in 522f8da

_integrations = sentry_defaultIntegrations();

vs

sentry-cocoa/Sources/Sentry/SentrySDK.m

Line 467 in 9e94954

NSArray<Class> *defaultIntegrations = SentryOptions.defaultIntegrationClasses;