deprecate patch files

Author: hamzaremmal

library/src/scala/runtime/stdLibPatches/Predef.scala

@@ -5,6 +5,7 @@ import scala.language.experimental.captureChecking
 import scala.annotation.experimental
 import scala.annotation.internal.RuntimeChecked
 
+@deprecated(message = "Patches to the stdlib are not applied anymore", since = "3.8.0")
 object Predef:
   import compiletime.summonFrom
 

library/src/scala/runtime/stdLibPatches/language.scala

@@ -6,6 +6,7 @@ import scala.annotation.compileTimeOnly
 
 /** Scala 3 additions and replacements to the `scala.language` object.
  */
+@deprecated(message = "Patches to the stdlib are not applied anymore", since = "3.8.0")
 object language:
 
   /** The experimental object contains features that have been recently added but have not