[NI] Use projected type for constraint like Cap(out A) <: out @Exact T

This is an implicit semantics of Exact annotation

compiler/testData/codegen/box/delegatedProperty/valByMapDelegatedProperty.kt

@@ -0,0 +1,42 @@
+// WITH_RUNTIME
+// KJS_WITH_FULL_RUNTIME
+// IGNORE_BACKEND_FIR: JVM_IR
+
+import kotlin.test.*
+
+class ValByMapExtensionsTest {
+    val map: Map<String, String> = hashMapOf("a" to "all", "b" to "bar", "c" to "code")
+    val genericMap = mapOf<String, Any?>("i" to 1, "x" to 1.0)
+    val mmapOut: MutableMap<String, out String> = mutableMapOf("g" to "out", "g1" to "in")
+    val genericMmapOut: MutableMap<String, out Any?> = mmapOut
+
+    val a by map
+    val b: String by map
+    val c: Any by map
+    val d: String? by map
+    val e: String by map.withDefault { "default" }
+    val f: String? by map.withDefault { null }
+    val g: String by mmapOut
+    val g1: String by genericMmapOut
+
+    val i: Int by genericMap
+    val x: Double by genericMap
+
+    fun doTest() {
+        assertEquals("all", a)
+        assertEquals("bar", b)
+        assertEquals("code", c)
+        assertEquals("default", e)
+        assertEquals(null, f)
+        assertEquals("out", g)
+        assertEquals("in", g1)
+        assertEquals(1, i)
+        assertEquals(1.0, x)
+        assertFailsWith<NoSuchElementException> { d }
+    }
+}
+
+fun box(): String {
+    ValByMapExtensionsTest().doTest()
+    return "OK"
+}