Update annotation rendering in diagnostics

Disable annotation rendering in default type and descriptor renderers.
Preserve annotations in Android and Serialization plugins.
Update error texts in ide tests.
Nullability annotations in Java descriptors are rendered with context-dependent renderer.

#KT-20258 Fixed

compiler/testData/diagnostics/tests/annotations/rendering/unusedValue.kt

@@ -0,0 +1,12 @@
+// !RENDER_DIAGNOSTICS_MESSAGES
+// !DIAGNOSTICS: -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE
+
+@Target(AnnotationTarget.PROPERTY,  AnnotationTarget.FUNCTION, AnnotationTarget.TYPE,  AnnotationTarget.LOCAL_VARIABLE)
+annotation class A
+
+@A
+fun test() {
+    @A
+    var b: @A Int = 0
+    <!UNUSED_VALUE("15", "var b: Int defined in test")!>b =<!> 15
+}