Minor: move callable reference IR tests to a separate directory

compiler/testData/ir/irText/expressions/callableReferences/withAdaptedArguments.kt

@@ -0,0 +1,22 @@
+// !LANGUAGE: +NewInference, +FunctionReferenceWithDefaultValueAsOtherType
+import Host.importedObjectMemberWithVarargs
+
+fun use(fn: (Int) -> String) = fn(1)
+
+fun coerceToUnit(fn: (Int) -> Unit) {}
+
+fun fnWithDefault(a: Int, b: Int = 42) = "abc"
+
+fun fnWithVarargs(vararg xs: Int) = "abc"
+
+object Host {
+    fun importedObjectMemberWithVarargs(vararg xs: Int) = "abc"
+}
+
+fun testDefault() = use(::fnWithDefault)
+
+fun testVararg() = use(::fnWithVarargs)
+
+fun testCoercionToUnit() = coerceToUnit(::fnWithDefault)
+
+fun testImportedObjectMember() = use(::importedObjectMemberWithVarargs)