List GHC.Event.Internal in base.cabal on Windows

GHC.Event.Internal was not listed in base.cabal on Windows. This caused
undefined reference errors. This patch adds it back, by moving it out
of the OS-specific logic in base.cabal.

Fixes #21245.

libraries/base/base.cabal

@@ -336,7 +336,14 @@ Library
         GHC.IO.Handle.Lock.NoOp
         GHC.IO.Handle.Lock.Windows
         GHC.StaticPtr.Internal
+        GHC.Event.Arr
+        GHC.Event.Array
+        GHC.Event.Internal
         GHC.Event.Internal.Types
+        GHC.Event.IntTable
+        GHC.Event.IntVar
+        GHC.Event.PSQ
+        GHC.Event.Unique
         -- GHC.IOPort -- TODO: hide again after debug
         System.Environment.ExecutablePath
         System.CPUTime.Utils
@@ -409,12 +416,6 @@ Library
             GHC.IO.Windows.Encoding
             GHC.IO.Windows.Paths
         other-modules:
-            GHC.Event.Arr
-            GHC.Event.Array
-            GHC.Event.IntTable
-            GHC.Event.IntVar
-            GHC.Event.PSQ
-            GHC.Event.Unique
             System.CPUTime.Windows
         c-sources:
             cbits/Win32Utils.c
@@ -425,20 +426,13 @@ Library
         exposed-modules:
             GHC.Event
         other-modules:
-            GHC.Event.Arr
-            GHC.Event.Array
             GHC.Event.Control
             GHC.Event.EPoll
-            GHC.Event.IntTable
-            GHC.Event.IntVar
-            GHC.Event.Internal
             GHC.Event.KQueue
             GHC.Event.Manager
-            GHC.Event.PSQ
             GHC.Event.Poll
             GHC.Event.Thread
             GHC.Event.TimerManager
-            GHC.Event.Unique
 
             System.CPUTime.Posix.ClockGetTime
             System.CPUTime.Posix.Times