[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/callableReference/resolve/ambiguousWithVararg.fir.kt

@@ -0,0 +1,16 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+fun fun1() {}
+fun fun1(x: Int) {}
+
+val ref1 = <!UNRESOLVED_REFERENCE!>::fun1<!>
+
+fun fun2(vararg x: Int) {}
+fun fun2(x: Int) {}
+
+val ref2 = <!UNRESOLVED_REFERENCE!>::fun2<!>
+
+fun fun3(x0: Int, vararg xs: Int) {}
+fun fun3(x0: String, vararg xs: String) {}
+
+val ref3 = <!UNRESOLVED_REFERENCE!>::fun3<!>