fix KT-9652 Warning to specify expected type as Any? when it is already Any?

#KT-9652 Fixed

compiler/frontend/src/org/jetbrains/kotlin/types/expressions/DataFlowAnalyzer.java

@@ -286,6 +286,9 @@ public class DataFlowAnalyzer {
                     return expressionType;
                 }
             }
+            else if (isIfExpression && context.expectedType != NO_EXPECTED_TYPE) {
+                return expressionType;
+            }
             else {
                 context.trace.report(IMPLICIT_CAST_TO_UNIT_OR_ANY.on(expression, expressionType));
             }

compiler/testData/diagnostics/tests/controlStructures/kt770.kt351.kt735_StatementType.kt

@@ -114,6 +114,39 @@ fun testImplicitCoercion() {
     })
 }
 
+fun fooWithAnyArg(<!UNUSED_PARAMETER!>arg<!>: Any) {}
+fun fooWithAnyNullableArg(<!UNUSED_PARAMETER!>arg<!>: Any?) {}
+
+fun testCoercionToAny() {
+    val d = 21
+    val <!UNUSED_VARIABLE!>x1<!>: Any = if (1>2) 1 else 2.0
+    val <!UNUSED_VARIABLE!>x2<!>: Any? = if (1>2) 1 else 2.0
+    val <!UNUSED_VARIABLE!>x3<!>: Any? = if (1>2) 1 else (if (1>2) null else 2.0)
+
+    fooWithAnyArg(if (1>2) 1 else 2.0)
+    fooWithAnyNullableArg(if (1>2) 1 else 2.0)
+    fooWithAnyNullableArg(if (1>2) 1 else (if (1>2) null else 2.0))
+
+    val <!UNUSED_VARIABLE!>y1<!>: Any = when(d) { 1 -> 1.0 else -> 2.0 }
+    val <!UNUSED_VARIABLE!>y2<!>: Any? = when(d) { 1 -> 1.0 else -> 2.0 }
+    val <!UNUSED_VARIABLE!>y3<!>: Any? = when(d) { 1 -> 1.0; 2 -> null; else -> 2.0 }
+
+    fooWithAnyArg(when(d) { 1 -> 1.0 else -> 2.0 })
+    fooWithAnyNullableArg(when(d) { 1 -> 1.0 else -> 2.0 })
+    fooWithAnyNullableArg(when(d) { 1 -> 1.0; 2 -> null; else -> 2.0 })
+}
+
+fun fooWithAnuNullableResult(s: String?, name: String, optional: Boolean): Any? {
+    return if (s == null) {
+        if (!optional) {
+            throw java.lang.IllegalArgumentException("Parameter '$name' was not found in the request")
+        }
+        null
+    } else {
+        name
+    }
+}
+
 fun bar(<!UNUSED_PARAMETER!>a<!>: Unit) {}
 
 fun testStatementInExpressionContext() {

compiler/testData/diagnostics/tests/controlStructures/kt770.kt351.kt735_StatementType.txt

@@ -6,9 +6,13 @@ package kt770_351_735 {
     public fun box(): kotlin.Int
     public fun doSmth(/*0*/ i: kotlin.Int): kotlin.Unit
     public fun foo(): kotlin.Unit
+    public fun fooWithAnuNullableResult(/*0*/ s: kotlin.String?, /*1*/ name: kotlin.String, /*2*/ optional: kotlin.Boolean): kotlin.Any?
+    public fun fooWithAnyArg(/*0*/ arg: kotlin.Any): kotlin.Unit
+    public fun fooWithAnyNullableArg(/*0*/ arg: kotlin.Any?): kotlin.Unit
     public fun main(/*0*/ args: kotlin.Array<kotlin.String>): kotlin.Unit
     public fun test1(): kotlin.Unit
     public fun test2(): kotlin.Unit
+    public fun testCoercionToAny(): kotlin.Unit
     public fun testCoercionToUnit(): kotlin.Unit
     public fun testImplicitCoercion(): kotlin.Unit
     public fun testStatementInExpressionContext(): kotlin.Unit