Merge pull request #9625 from smowton/smowton/test/kotlin-1-7-support

Switch to using Kotlin 1.7 by default

java/kotlin-extractor/src/main/kotlin/KotlinFileExtractor.kt

@@ -86,6 +86,7 @@ open class KotlinFileExtractor(
         }
     }
 
+    @OptIn(ObsoleteDescriptorBasedAPI::class)
     private fun isFake(d: IrDeclarationWithVisibility): Boolean {
         val visibility = d.visibility
         if (visibility is DelegatedDescriptorVisibility && visibility.delegate == Visibilities.InvisibleFake) {
@@ -94,6 +95,9 @@ open class KotlinFileExtractor(
         if (d.isFakeOverride) {
             return true
         }
+        if ((d as? IrFunction)?.descriptor?.isHiddenToOvercomeSignatureClash == true) {
+            return true
+        }
         return false
     }