Remastering of documentation provider

- Remove whole file resolve
- Take already resolved element
- Get kotlin element behind the wrapper directly
- Remove outdated isKotlinDeclaration method
- More tests

idea/testData/editor/quickDoc/JavaMethodUsedInKotlin.kt

@@ -0,0 +1,5 @@
+fun ktTest() {
+    Test.<caret>foo("SomeTest")
+}
+
+//INFO: <b>public</b> <b>open</b> <b>fun</b> foo(param: jet.String?): jet.Array&lt;jet.Any&gt;? <i>defined in</i> Test<br/>Java declaration:<br/>Test...