publicField -> JvmField

Effectively drop publicField and introduce JvmField (which has the same effect for now)
Implement frontend checks for @JvmField
Replace publicField -> JvmField in test data

compiler/testData/asJava/lightClasses/publicField/Simple.kt

@@ -1,5 +1,5 @@
 // C
 
 class C {
-    @[kotlin.jvm.publicField] private val foo: String = "A"
+    @[kotlin.jvm.JvmField] private val foo: String = "A"
 }