Fix IndexOutOfBounds crash on iOS

[buenaflor]

📜 Description

Fixes an IndexOutOfBoundsException in the dropCommonAddresses function when processing stack traces on Kotlin/Native iOS. The issue was caused by incorrect index handling during the dropLastWhile operation.

💡 Motivation and Context

Closes #432

💚 How did you test it?

Manually tested: the following test crashes without the fix with IndexOutOfBoundsException

@Test
fun testDropCommon_ExcessiveTrailingMatches() {
    val commonAddresses = listOf<Long>(1, 2)
    val addresses = listOf<Long>(9, 8, 7, 2, 1, 2)
    val result = addresses.dropCommonAddresses(commonAddresses)

    // wont reach because it crashes
    assertEquals(listOf(9L, 8L, 7L), result)
}

Existing unit tests were run to verify the fix and ensure no regressions.

📝 Checklist

You have to check all boxes before merging:

• I reviewed the submitted code.
• 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.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.

🔮 Next steps

Release this fix in an upcoming version to allow users to update their Sentry KMP dependency.

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[buenaflor]

@sentry review

[markushi]

LGTM!