Effects: add diagnostic tests on contracts

- Make AbstractDiagnosticsTest dump function contracts
- Add diagnostics tests on parsing contracts
- Add diagnostics tests on smartcats in presence of functions with
contracts
- Add diagnostics tests on initialization and flow in presence of
in-place called lambdas

==========
Introduction of EffectSystem: 16/18

compiler/testData/diagnostics/testsWithStdLib/contracts/controlflow/flowInlining/expressionBody.txt

@@ -0,0 +1,5 @@
+package
+
+public fun functionWithExpressionBody(/*0*/ x: kotlin.Int): kotlin.Boolean
+public inline fun </*0*/ T> myRun(/*0*/ block: () -> T): T
+    CallsInPlace(block, EXACTLY_ONCE)