[embedded] Guard @_transparent in UnsafePointer APIs with #if

Author: kubamracek

stdlib/public/core/UnsafePointer.swift

@@ -442,7 +442,9 @@ extension UnsafePointer {
   /// - Returns: A pointer to the stored property represented
   ///            by the key path, or `nil`.
   @_alwaysEmitIntoClient
+  #if $Embedded
   @_transparent
+  #endif
   public func pointer<Property>(
     to property: KeyPath<Pointee, Property>
   ) -> UnsafePointer<Property>? {
@@ -1326,7 +1328,9 @@ extension UnsafeMutablePointer {
   /// - Returns: A pointer to the stored property represented
   ///            by the key path, or `nil`.
   @_alwaysEmitIntoClient
+  #if $Embedded
   @_transparent
+  #endif
   public func pointer<Property>(
     to property: KeyPath<Pointee, Property>
   ) -> UnsafePointer<Property>? {
@@ -1348,7 +1352,9 @@ extension UnsafeMutablePointer {
   /// - Returns: A mutable pointer to the stored property represented
   ///            by the key path, or `nil`.
   @_alwaysEmitIntoClient
+  #if $Embedded
   @_transparent
+  #endif
   public func pointer<Property>(
     to property: WritableKeyPath<Pointee, Property>
   ) -> UnsafeMutablePointer<Property>? {