add @suppress to the list of known KDoc tags

#KT-9415 Fixed

compiler/frontend/src/org/jetbrains/kotlin/kdoc/parser/KDocKnownTag.java

@@ -28,7 +28,8 @@ public enum KDocKnownTag {
     SINCE(false, false),
     CONSTRUCTOR(false, true),
     PROPERTY(true, true),
-    SAMPLE(true, false);
+    SAMPLE(true, false),
+    SUPPRESS(false, false);
 
     private final boolean takesReference;
     private final boolean startsSection;

idea/idea-completion/testData/kdoc/TagName.kt

@@ -6,3 +6,4 @@ fun f(x: Int): Int {
 
 // EXIST: @param
 // EXIST: @return
+// EXIST: @suppress