Fix applying WindowInsets inside Popup/Dialog

[MatkovIvan]

Proposed Changes

• Unwrap unnecessary state for LocalSafeArea/LocalLayoutMargins
• Override LocalSafeArea/LocalLayoutMargins for separate owners.
• Replace IOSInsets to PlatformInsets - Don't use data classes in an API

Changes in API

-androidx.compose.ui.uikit.IOSInsets
+androidx.compose.ui.platform.PlatformInsets

-androidx.compose.ui.uikit.LocalSafeAreaState
+androidx.compose.ui.platform.LocalSafeArea

-androidx.compose.ui.uikit.LocalLayoutMarginsState
+androidx.compose.ui.platform.LocalLayoutMargins

Testing

Box(modifier = Modifier
    .fillMaxSize()
    .windowInsetsPadding(WindowInsets.systemBars)
    .background(Color.Green)
)
Popup {
    Box(modifier = Modifier
        .fillMaxSize()
        .windowInsetsPadding(WindowInsets.systemBars)
        .background(Color.Red)
    )
}

Android	iOS (Before)	iOS (After)

Issues Fixed

Fixes (partially) JetBrains/compose-multiplatform#3701