Fix suppress at statement intention for asigmnents

There's no need now to consider precedence of element as
annotation preceding the beginning of block statement
is always now attached to the whole statement

 #KT-11673 Fixed
 #KT-12780 Fixed

idea/testData/quickfix/suppress/forStatement/less.kt.after

@@ -2,5 +2,5 @@
 
 fun foo() {
     @Suppress("UNNECESSARY_NOT_NULL_ASSERTION")
-    (1<caret>!! < 2)
+    1<caret>!! < 2
 }