[FIR] Add resolution of contracts that are written using the new syntax

compiler/fir/analysis-tests/testData/resolveWithStdlib/contracts/fromSource/good/variousContracts/newSyntax/functionsWithContract.kt

@@ -0,0 +1,22 @@
+import kotlin.contracts.*
+
+fun test1(arg: Any?) contract [
+    returns() implies (arg != null)
+] {
+    require(arg != null)
+}
+
+fun test2(s: String?, block: () -> Unit) contract [
+    returns() implies (s != null),
+    callsInPlace(block, InvocationKind.EXACTLY_ONCE)
+] {
+    require(s != null)
+    block()
+}
+
+fun test3(arg: Any?): Boolean contract [
+    returns(true) implies (arg != null)
+] {
+    require(arg != null)
+    return true
+}

compiler/fir/analysis-tests/testData/resolveWithStdlib/contracts/fromSource/good/variousContracts/newSyntax/functionsWithContract.txt

@@ -0,0 +1,28 @@
+FILE: functionsWithContract.kt
+    public final fun test1(arg: R|kotlin/Any?|): R|kotlin/Unit|
+        [R|Contract description]
+         <
+            Returns(WILDCARD) -> arg != null
+        >
+     {
+        R|kotlin/require|(!=(R|<local>/arg|, Null(null)))
+    }
+    public final fun test2(s: R|kotlin/String?|, block: R|() -> kotlin/Unit|): R|kotlin/Unit|
+        [R|Contract description]
+         <
+            Returns(WILDCARD) -> s != null
+            CallsInPlace(block, EXACTLY_ONCE)
+        >
+     {
+        R|kotlin/require|(!=(R|<local>/s|, Null(null)))
+        R|<local>/block|.R|FakeOverride<kotlin/Function0.invoke: R|kotlin/Unit|>|()
+    }
+    public final fun test3(arg: R|kotlin/Any?|): R|kotlin/Boolean|
+        [R|Contract description]
+         <
+            Returns(TRUE) -> arg != null
+        >
+     {
+        R|kotlin/require|(!=(R|<local>/arg|, Null(null)))
+        ^test3 Boolean(true)
+    }