[TD] Update test data after previous commit

compiler/fir/analysis-tests/testData/resolve/expresssions/operators/plus.kt

@@ -11,4 +11,4 @@ fun test_1() {
 fun test_2() {
     var f = Foo()
     f += Foo()
-}
+}

compiler/fir/analysis-tests/testData/resolve/expresssions/operators/plusAndPlusAssign.kt

@@ -6,4 +6,4 @@ class Foo {
 fun test() {
     var f = Foo()
     <!ASSIGN_OPERATOR_AMBIGUITY!>f += f<!>
-}
+}

compiler/fir/analysis-tests/testData/resolve/expresssions/operators/plusAssign.kt

@@ -7,7 +7,7 @@ class Foo {
 
 fun test_1() {
     val f = Foo()
-    f <!UNRESOLVED_REFERENCE!>+<!> f
+    <!UNRESOLVED_REFERENCE{LT}!>f <!UNRESOLVED_REFERENCE{PSI}!>+<!> f<!>
 }
 
 fun test_2() {
@@ -19,4 +19,4 @@ fun test_3(f: Foo) {
     f += f
     f += ""
     f += 1
-}
+}