Fix PsiInvalidElementAccessException in suppression check (EA-71132)

compiler/frontend/src/org/jetbrains/kotlin/resolve/diagnostics/KotlinSuppressCache.kt

@@ -69,7 +69,10 @@ abstract class KotlinSuppressCache {
     private fun isSuppressed(request: SuppressRequest): Boolean {
         // If diagnostics are reported in a synthetic file generated by KtPsiFactory (dummy.kt),
         // there's no point to present such diagnostics to the user, because the user didn't write this code
-        val file = request.element.containingFile
+        val element = request.element
+        if (!element.isValid) return true
+
+        val file = element.containingFile
         if (file is KtFile) {
             if (file.doNotAnalyze != null) return true
         }
@@ -80,7 +83,7 @@ abstract class KotlinSuppressCache {
             }
         }
 
-        val annotated = KtStubbedPsiUtil.getPsiOrStubParent(request.element, KtAnnotated::class.java, false) ?: return false
+        val annotated = KtStubbedPsiUtil.getPsiOrStubParent(element, KtAnnotated::class.java, false) ?: return false
 
         return isSuppressedByAnnotated(request.suppressKey, request.severity, annotated, 0)
     }