• Define APPLE_HYBRID_GLOBALIZATION symbol for the 3 OSes and use it throughout the implementation instead of defined(TARGET_MACCATALYST) || defined(TARGET_IOS) || defined(TARGET_TVOS) conditions in all files under https://github.com/dotnet/runtime/tree/main/src/native/libs/System.Globalization.Native
• HybridGlobalization is supported only on iOS/tvOS/macCatalyst not OSX. Rename IsHybridGlobalizationOnOSX / IsNotHybridGlobalizationOnOSX to IsHybridGlobalizationOnApplePlatform / IsNotHybridGlobalizationOnApplePlatform https://github.com/dotnet/runtime/blob/main/src/libraries/Common/tests/TestUtilities/System/PlatformDetection.cs#L384.
• Remove IsIcuGlobalizationAndNotHybrid property
• Check if possible to include "pal_utilities.h" in pal_placeholders.h instead of defining asserts, look discussion [HybridGlobalization] Include all globalization symbols #96684 (comment)
  we shouldn't mix our configs with pal_config.h.in, so we will keep the way it was implemented.

Contributes to #80689