Effects: add DSL for declaration of contracts

- Introduce DSL for declaration of contracts. Functions and classes in
this DSL do not bear any computational semantics: in fact, they all do
not exist on runtime. Whole work of extracting semantics from such calls
is done by special parts of compiler

- To make distinguishing those declarations more robust and
convenient, introduce internal annotation @ContractsDSL

- Turn off InlineChecker inside contracts DSL. We do this, because some
functions from DSL should take any possible lambda, so we can't write
any type besides 'Function<R>'. However, InlineChecker will complain if
we will pass inlined lambda in such function -- though, this is false
positive because we know that functions from contracts DSL will never be
executed

- Change testData on HierarchyTestWithLib, where new enum from
kotlin.internal changed expected output

==========
Effect System introduction: 7/18

idea/testData/hierarchy/withLib/enum/Enum_verification.xml

@@ -9,9 +9,11 @@
     <node text="PrintMode in JTable (javax.swing)"/>
     <node text="ElementType (java.lang.annotation)"/>
     <node text="State in Thread (java.lang)"/>
-    <node text="RetentionPolicy (java.lang.annotation)"/>
     <node text="Type in Window (java.awt)"/>
-    <node text="Kind in KParameter (kotlin.reflect)"/>
+    <node text="RetentionPolicy (java.lang.annotation)"/>
+    <node text="InvocationKind (kotlin.internal.contracts)"/>
+    <node text="One ()"/>
+    <node text="G ()"/>
     <node text="FileWalkDirection (kotlin.io)"/>
     <node text="OnErrorAction (kotlin.io)"/>
     <node text="RegexOption (kotlin.text)"/>
@@ -22,9 +24,8 @@
     <node text="AnnotationTarget (kotlin.annotation)"/>
     <node text="AnnotationRetention (kotlin.annotation)"/>
     <node text="State (kotlin.collections)"/>
-    <node text="DeprecationLevel (kotlin)"/>
     <node text="LazyThreadSafetyMode (kotlin)"/>
-    <node text="One ()"/>
-    <node text="G ()"/>
+    <node text="DeprecationLevel (kotlin)"/>
+    <node text="Kind in KParameter (kotlin.reflect)"/>
   </node>
 </node>