ref: Removes defaultIntegrations from SentryOptions

[noahsmartin]

#skip-changelog

Closes #6665

[philipphofmann]

LGTM, we should also update the docs https://docs.sentry.io/platforms/apple/guides/ios/configuration/options/#defaultIntegrations.

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
3980	1	3979	14

View the top 1 failed test(s) by shortest run time

iOS_SwiftUI_UITests.LaunchUITests::testCaptureErrorReturnsValidId

Stack Traces | 0s run time

.../iOS-SwiftUI/iOS-SwiftUI-UITests/LaunchUITests.swift:91 - Failed to terminate io.sentry.iOS-SwiftUI:7569: Failed to terminate io.sentry.iOS-SwiftUI:0

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[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1220.41 ms	1246.24 ms	25.84 ms
Size	23.75 KiB	1023.77 KiB	1000.02 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
d66f082	1227.08 ms	1247.04 ms	19.96 ms
09471ff	1239.98 ms	1256.65 ms	16.67 ms
fc0757d	1231.83 ms	1248.98 ms	17.15 ms
1bf432b	1200.22 ms	1226.90 ms	26.67 ms
b6f8eb3	1217.94 ms	1246.57 ms	28.63 ms
2ec2700	1238.28 ms	1258.82 ms	20.53 ms
52603c5	1226.94 ms	1257.66 ms	30.72 ms
409a607	1229.57 ms	1251.45 ms	21.88 ms
7d88965	1228.86 ms	1248.53 ms	19.67 ms
2be5991	1228.55 ms	1264.65 ms	36.10 ms

App size

Revision	Plain	With Sentry	Diff
d66f082	23.75 KiB	928.85 KiB	905.10 KiB
09471ff	23.75 KiB	990.16 KiB	966.41 KiB
fc0757d	23.75 KiB	850.73 KiB	826.98 KiB
1bf432b	23.75 KiB	926.64 KiB	902.90 KiB
b6f8eb3	23.75 KiB	988.70 KiB	964.95 KiB
2ec2700	23.75 KiB	980.80 KiB	957.05 KiB
52603c5	23.75 KiB	969.78 KiB	946.03 KiB
409a607	23.74 KiB	874.08 KiB	850.33 KiB
7d88965	23.75 KiB	994.72 KiB	970.98 KiB
2be5991	23.75 KiB	994.73 KiB	970.98 KiB