chore: Do not report macro warning for String interpolators

Author: hamzaremmal

compiler/src/dotty/tools/dotc/transform/PostTyper.scala

@@ -256,7 +256,10 @@ class PostTyper extends MacroTransform with InfoTransformer { thisPhase =>
               for publicInBinaryAnnot <- publicInBinaryAnnotOpt do sym.addAnnotation(publicInBinaryAnnot)
             else
               sym.keepAnnotationsCarrying(thisPhase, Set(defn.GetterMetaAnnot, defn.FieldMetaAnnot), orNoneOf = defn.NonBeanMetaAnnots)
-          if sym.isScala2Macro && !ctx.settings.XignoreScala2Macros.value then
+          if sym.isScala2Macro && !ctx.settings.XignoreScala2Macros.value &&
+             sym != defn.StringContext_raw &&
+             sym != defn.StringContext_f &&
+             sym != defn.StringContext_s then
             if !sym.owner.unforcedDecls.exists(p => !p.isScala2Macro && p.name == sym.name && p.signature == sym.signature)
                // Allow scala.reflect.materializeClassTag to be able to compile scala/reflect/package.scala
                // This should be removed on Scala 3.x