[FIR] KT-37027: Add 'out' projection to vararg elements

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

@@ -12,5 +12,5 @@ fun Foo.bar(vararg x: Int) = ""
 
 
 fun actualTest() {
-    <!INAPPLICABLE_CANDIDATE!>test<!>(<!UNRESOLVED_REFERENCE!>Foo::bar<!>)
+    test(Foo::bar)
 }

compiler/testData/diagnostics/tests/generics/projectionsScope/varargs.fir.kt

@@ -7,7 +7,7 @@ class A<T> {
 
 fun test(a: A<out CharSequence>, y: Array<out CharSequence>) {
     a.foo("", "", "")
-    a.<!INAPPLICABLE_CANDIDATE!>foo<!>(*y)
+    a.foo(*y)
     // TODO: TYPE_MISMATCH_DUE_TO_TYPE_PROJECTIONS probably redundant
-    a.<!INAPPLICABLE_CANDIDATE!>foo<!>(*y, "")
+    a.foo(*y, "")
 }

compiler/testData/diagnostics/tests/varargs/kt2163.fir.kt

@@ -3,5 +3,5 @@
 fun printAll(vararg a : Any) {}
 
 fun main(args: Array<String>) {
-    <!INAPPLICABLE_CANDIDATE!>printAll<!>(*args) // Shouldn't be an error
+    printAll(*args) // Shouldn't be an error
 }

compiler/testData/diagnostics/tests/varargs/varargViewedAsArray.fir.kt

@@ -19,7 +19,7 @@ fun useTwoStringArrays(fn: (Array<String>, Array<String>) -> Unit) = fn(arrayOf(
 fun test() {
     <!INAPPLICABLE_CANDIDATE!>useStrings<!>(::stringVararg)
     useStringArray(::stringVararg)
-    <!INAPPLICABLE_CANDIDATE!>useIntArray<!>(::numberVararg)
+    useIntArray(::numberVararg)
     usePrimitiveIntArray(::intVararg)
     <!INAPPLICABLE_CANDIDATE!>useIntArray<!>(::intVararg)
     <!INAPPLICABLE_CANDIDATE!>useMixedStringArgs1<!>(::stringVararg)

compiler/testData/diagnostics/tests/varargs/varargsAndOut2.fir.kt

@@ -4,6 +4,6 @@ fun bar(vararg a: String) {}
 
 fun test2(a: Array<String>, b: Array<out String>) {
     bar(*a)
-    <!INAPPLICABLE_CANDIDATE!>bar<!>(*b)
-    <!INAPPLICABLE_CANDIDATE!>bar<!>("", *a, *b, "")
+    bar(*b)
+    bar("", *a, *b, "")
 }