Instantiation of annotations for JVM IR with the corresponding feature flag

Seperate checker for platforms that do not support this language feature yet

Synthetic implementations of annotations are generated on-demand with proper 
equals, hashCode, and annotationType methods

#KT-47699 Fixed

compiler/testData/codegen/box/annotations/instances/annotationEqHc.kt

@@ -0,0 +1,30 @@
+// IGNORE_BACKEND_FIR: JVM_IR
+// TARGET_BACKEND: JVM_IR
+
+// WITH_RUNTIME
+// !LANGUAGE: +InstantiationOfAnnotationClasses
+
+import kotlin.reflect.KClass
+
+annotation class Bar(val i:Int, val s: String, val f: Float)
+
+annotation class Foo(
+    val int: Int,
+    val s: String,
+    val arr: Array<String>,
+    val arr2: IntArray,
+    val kClass: KClass<*>,
+    val bar: Bar
+)
+
+data class BarLike(val i:Int, val s: String, val f: Float)
+
+fun box(): String {
+    val foo1 = Foo(42, "foo", arrayOf("a", "b"), intArrayOf(1,2), Bar::class, Bar(10, "bar", Float.NaN))
+    val foo2 = Foo(42, "foo", arrayOf("a", "b"), intArrayOf(1,2), Bar::class, Bar(10, "bar", Float.NaN))
+    if (foo1 != foo2) return "Failed equals"
+    val barlike = BarLike(10, "bar", Float.NaN)
+    if (barlike.hashCode() != foo1.bar.hashCode()) return "Failed HC1"
+    if (barlike.hashCode() != foo2.bar.hashCode()) return "Failed HC2"
+    return "OK"
+}