Move codegen tests on old language versions under oldLanguageVersions/

This directory is skipped in JVM IR test generator, so they won't show
up as failed anymore.

Note that only failing tests are moved to oldLanguageVersions/. Tests
which already pass are still being run. It may be useful not to break
them in case we _do_ need to support some pre-1.3 language feature
switches in JVM IR.

compiler/testData/codegen/bytecodeText/constProperty/accessorsForPrivateConstants.kt

@@ -1,22 +0,0 @@
-// !LANGUAGE: -InlineConstVals
-// IGNORE_BACKEND: JVM_IR
-// FILE: Foo.kt
-
-private const val OUTER_PRIVATE = 20
-
-class Foo {
-    companion object {
-        private const val LOCAL_PRIVATE = 20
-    }
-
-    fun foo() {
-        // Access to the property use getstatic on the backed field
-        LOCAL_PRIVATE
-        // Access to the property requires an invokestatic
-        OUTER_PRIVATE
-    }
-}
-
-// 1 INVOKESTATIC
-// 1 PUTSTATIC
-// 2 GETSTATIC