Effects: add test on (de)serialization of contracts

- Add ContractDescriptorRenderer
- Add option to dump function contracts in DescriptorRendererOptions
- Add parsing of LANGUAGE_VERSION directive in AbstractLoadJava
- Add tests on serialization-deserializaton identity of contracts

==========
Introduction of EffectSystem: 13/18

compiler/testData/loadJava/compiledKotlinWithStdlib/contracts/fromStandardKt.kt

@@ -0,0 +1,65 @@
+// LANGUAGE_VERSION: 1.3
+@file:Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE")
+
+package test
+
+import kotlin.internal.contracts.*
+
+public inline fun <R> run(block: () -> R): R {
+    contract {
+        callsInPlace(block, InvocationKind.EXACTLY_ONCE)
+    }
+    return block()
+}
+
+public inline fun <T, R> T.run(block: T.() -> R): R {
+    contract {
+        callsInPlace(block, InvocationKind.EXACTLY_ONCE)
+    }
+    return block()
+}
+
+public inline fun <T, R> with(receiver: T, block: T.() -> R): R {
+    contract {
+        callsInPlace(block, InvocationKind.EXACTLY_ONCE)
+    }
+    return receiver.block()
+}
+
+public inline fun <T> T.apply(block: T.() -> Unit): T {
+    contract {
+        callsInPlace(block, InvocationKind.EXACTLY_ONCE)
+    }
+    block()
+    return this
+}
+
+public inline fun <T> T.also(block: (T) -> Unit): T {
+    contract {
+        callsInPlace(block, InvocationKind.EXACTLY_ONCE)
+    }
+    block(this)
+    return this
+}
+
+public inline fun <T, R> T.let(block: (T) -> R): R {
+    contract {
+        callsInPlace(block, InvocationKind.EXACTLY_ONCE)
+    }
+    return block(this)
+}
+
+public inline fun <T> T.takeIf(predicate: (T) -> Boolean): T? {
+    contract {
+        callsInPlace(predicate, InvocationKind.EXACTLY_ONCE)
+    }
+    return if (predicate(this)) this else null
+}
+
+public inline fun repeat(times: Int, action: (Int) -> Unit) {
+    contract { callsInPlace(action) }
+
+    for (index in 0..times - 1) {
+        action(index)
+    }
+}