[FIR] Prohibit statement-like expressions in expression context

^KT-61067 Fixed

compiler/testData/diagnostics/tests/functionAsExpression/NameDeprecation.fir.kt

@@ -1,9 +1,9 @@
 fun foo() {
     class A
-    <!CONFLICTING_OVERLOADS!>fun bar()<!> {}
-    (<!CONFLICTING_OVERLOADS!>fun bar()<!> {})
-    <!CONFLICTING_OVERLOADS!>fun A.foo()<!> {}
-    (<!CONFLICTING_OVERLOADS!>fun A.foo()<!> {})
+    fun bar() {}
+    (<!ANONYMOUS_FUNCTION_WITH_NAME!>fun bar() {}<!>)
+    fun A.foo() {}
+    (<!ANONYMOUS_FUNCTION_WITH_NAME!>fun A.foo() {}<!>)
 
     <!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>run<!>(<!ANONYMOUS_FUNCTION_WITH_NAME!>fun foo() {}<!>)
 }