FIR: Do not create synthetic properties for non-Java accessors

^KT-35495 Fixed

compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/KotlinOverridesJava.fir.kt

@@ -22,9 +22,9 @@ fun foo(k: KotlinClass) {
     useString(k.something3)
 
     k.setSomething4("")
-    k.something4 += ""
+    k.<!UNRESOLVED_REFERENCE, VARIABLE_EXPECTED!>something4<!> += ""
     k.<!INAPPLICABLE_CANDIDATE!>setSomething4<!>(null)
-    k.something4 = null
+    k.<!UNRESOLVED_REFERENCE!>something4<!> = null
 
     useString(k.getSomething5())
     useString(k.something5)