Allow suspend-conversion for callable references as part of adaptation

compiler/testData/diagnostics/tests/suspendConversion/suspendConversionCompatibilityInDisabledMode.kt

@@ -10,7 +10,7 @@ object Test1 {
         fun bar(x: Int = 42): String = ""
 
         fun test() {
-            val result = foo(<!UNSUPPORTED_FEATURE!>::bar<!>)
+            val result = foo(::bar)
             <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.String")!>result<!>
         }
     }

compiler/testData/diagnostics/tests/suspendConversion/suspendConversionDisabled.kt

@@ -20,7 +20,7 @@ fun test(
     foo2(<!UNSUPPORTED_FEATURE!>f2<!>)
     foo3(<!UNSUPPORTED_FEATURE!>f3<!>)
 
-    foo1(<!UNSUPPORTED_FEATURE!>::bar<!>)
+    foo1(::bar)
 
     foo1(<!TYPE_MISMATCH, UNSUPPORTED_FEATURE!>f2<!>)
     foo1(<!TYPE_MISMATCH, UNSUPPORTED_FEATURE!>f3<!>)