Mark ErasedParam and TermParamClause.isErased as @experimental

Author: nicolasstucki

library/src/scala/annotation/internal/ErasedParam.scala

@@ -1,6 +1,6 @@
-package scala.annotation.internal
-
-import scala.annotation.Annotation
+package scala.annotation
+package internal
 
 /** An annotation produced by Namer to indicate an erased parameter */
+@experimental
 final class ErasedParam() extends Annotation

library/src/scala/quoted/Quotes.scala

@@ -1,5 +1,6 @@
 package scala.quoted
 
+import scala.annotation.experimental
 import scala.reflect.TypeTest
 
 /** Current Quotes in scope
@@ -2179,6 +2180,7 @@ trait Quotes { self: runtime.QuoteUnpickler & runtime.QuoteMatching =>
         /** Is this a given parameter clause `(using X1, ..., Xn)` or `(using x1: X1, ..., xn: Xn)` */
         def isGiven: Boolean
         /** Is this a erased parameter clause `(erased x1: X1, ..., xn: Xn)` */
+        @experimental
         def isErased: Boolean
     end TermParamClauseMethods