Allow to import members from object by name

Wrap object members so they do not require dispatch receiver
Hack jvm backend to make it work

compiler/testData/diagnostics/tests/scopes/kt900-1.kt

@@ -2,7 +2,7 @@
 package c
 
 import c.A.Companion.B
-import c.<!CANNOT_IMPORT_MEMBERS_FROM_SINGLETON!>M<!>.*
+import c.<!CANNOT_ALL_UNDER_IMPORT_FROM_SINGLETON!>M<!>.*
 
 fun foo() {
     val <!UNUSED_VARIABLE!>b<!>: B = B()

compiler/testData/diagnostics/tests/scopes/kt900-2.kt

@@ -2,9 +2,9 @@ package d
 
 //import from objects before properties resolve
 
-import d.<!CANNOT_IMPORT_MEMBERS_FROM_SINGLETON!>A<!>.*
+import d.<!CANNOT_ALL_UNDER_IMPORT_FROM_SINGLETON!>A<!>.*
 import d.M.R
-import d.M.R.<!CANNOT_IMPORT_MEMBERS_FROM_SINGLETON!>bar<!>
+import d.M.R.bar
 import d.M.T
 import d.M.Y
 
@@ -12,7 +12,7 @@ var r: T = T()
 val y: T = Y
 
 fun f() {
-    <!UNRESOLVED_REFERENCE!>bar<!>()
+    bar()
     R.bar()
     B.foo()
 }