Parser: allow function types as receiver type for function

compiler/testData/psi/functionReceivers/PropertiesWithFunctionReceivers.kt

@@ -1,34 +1,34 @@
-val {() : ()}.foo
-val {foo.bar.() : ()}.foo
+val ((Unit) -> Unit).foo
+val (foo.bar.() -> Unit).foo
 
-val {foo.bar.() : ()}.foo = foo
+val (foo.bar.() -> Unit).foo = foo
    get() {}
    set(it) {}
 
-val {foo.bar.() : ()}.foo = foo
+val (foo.bar.() -> Unit).foo = foo
    get() : Foo {}
    set(it) {}
 
 
-val {foo.bar.() : ()}.foo : bar = foo
+val (foo.bar.() -> Unit).foo : bar = foo
    [a] public get() {}
    open set(a : b) {}
 
 
-val {foo.bar.() : ()}.foo : bar = foo
+val (foo.bar.() -> Unit).foo : bar = foo
    open set(a : b) {}
 
 
-val {foo.bar.() : ()}.foo : bar = foo
+val (foo.bar.() -> Unit).foo : bar = foo
    [a] public get() {}
 
 // Error recovery:
 
-val {foo.bar.() : ()}.foo = foo
+val (foo.bar.() -> Unit).foo = foo
    set) {}
    dfget() {}
 
-val {foo.bar.() : ()}.foo = foo
+val (foo.bar.() -> Unit).foo = foo
    get(foo) {}
    set() {}
    set() {}