"annotation" is now parsed as an identifier. It is no longer a soft keyword.

Sometimes it's allowed to parse "annotation" unescaped even if other annotations must be escaped.
A set of annotations and their options tests.
A swarm of existing tests fixed (mostly kotlin.annotation.annotation() added to txt-files).
STUB_VERSION increased. Some quick fixes slightly changed.

compiler/testData/psi/annotation/options/local.kt

@@ -0,0 +1,5 @@
+fun foo(): Int {
+    @annotation class Ann
+    @Ann val x = 1
+    return x
+}