fix: Encode SwiftUI internal class names in session replay redaction to prevent App Store rejections

[itaybre]

📜 Description

Base64 encode a couple of Apple private classes to avoid triggering Apple's string verification

💡 Motivation and Context

Fixes: #7121

Apple seems to run some static checks when testing apps which detect some SwiftUI classes we try to avoid.
Encoding it, should fix the problem

💚 How did you test it?

📝 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.

Closes #7126

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
4076	1	4075	17

View the top 2 failed test(s) by shortest run time

iOS_SwiftUI_UITests.LaunchUITests::testTransactionSpan

Stack Traces | 0s run time

.../iOS-SwiftUI/iOS-SwiftUI-UITests/LaunchUITests.swift:18 - Failed to get matching snapshots: Timed out while evaluating UI query.

iOS_Swift_UITests.LaunchUITests::testCaptureException

Stack Traces | 0s run time

.../iOS-Swift/iOS-Swift-UITests/BaseUITest.swift:63 - Failed to terminate io.sentry.sample.iOS-Swift:11995: Failed to terminate io.sentry.sample.iOS-Swift:0

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[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1222.61 ms	1248.67 ms	26.06 ms
Size	24.14 KiB	1001.66 KiB	977.52 KiB

Baseline results on branch: v8.x

Startup times

Revision	Plain	With Sentry	Diff
5e3fb04	1239.84 ms	1267.39 ms	27.55 ms
b66be9b	1218.22 ms	1244.19 ms	25.96 ms
f73c5c8	1211.10 ms	1234.62 ms	23.51 ms
237dfb1	1214.90 ms	1258.63 ms	43.73 ms
c21a31f	1216.02 ms	1236.34 ms	20.32 ms
3af1ae9	1225.60 ms	1252.65 ms	27.05 ms
c21a31f	1237.04 ms	1256.65 ms	19.61 ms
653de7c	1205.02 ms	1222.20 ms	17.18 ms
e537c90	1226.22 ms	1256.64 ms	30.41 ms
48dc176	1204.96 ms	1237.73 ms	32.77 ms

App size

Revision	Plain	With Sentry	Diff
5e3fb04	23.74 KiB	981.30 KiB	957.56 KiB
b66be9b	23.75 KiB	996.03 KiB	972.28 KiB
f73c5c8	24.14 KiB	1001.32 KiB	977.18 KiB
237dfb1	23.75 KiB	1000.79 KiB	977.04 KiB
c21a31f	23.75 KiB	1000.80 KiB	977.05 KiB
3af1ae9	23.74 KiB	981.29 KiB	957.55 KiB
c21a31f	23.75 KiB	1000.77 KiB	977.02 KiB
653de7c	23.75 KiB	992.25 KiB	968.50 KiB
e537c90	23.75 KiB	992.03 KiB	968.28 KiB
48dc176	24.14 KiB	1001.34 KiB	977.20 KiB

Previous results on branch: itay/encode_base64_class

Startup times

Revision	Plain	With Sentry	Diff
2d3729e	1208.41 ms	1224.13 ms	15.72 ms

App size

Revision	Plain	With Sentry	Diff
2d3729e	24.14 KiB	1001.66 KiB	977.52 KiB

[philprime]

LGTM but we need to ensure our wording states that we are not trying to circumvent the review, just handling false-positives