report 'trait' keyword as deprecated, provide quickfix for replacing with 'interface'

compiler/testData/diagnostics/tests/DeprecatedTraitKeyword.kt

@@ -0,0 +1,2 @@
+<!DEPRECATED_TRAIT_KEYWORD!>trait<!> A {
+}

compiler/testData/diagnostics/tests/DeprecatedTraitKeyword.txt

@@ -0,0 +1,7 @@
+package
+
+internal interface A {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}