Remove ES_NEXT macro (#4915)

- remove all '#JERRY_ESNEXT' macro
- remove 5.1 build profile, update test runner accordingly (Note: all builtins are turn on by default)
- move tests from tests/jerry/esnext into tests/jerry, concatenate files with same names
- add skiplist to some snapshot tests that were supported only in 5.1
- fix doxygen issues that were hidden before (bc. of es.next macro)

Co-authored-by: Martin Negyokru negyokru@inf.u-szeged.hu
JerryScript-DCO-1.0-Signed-off-by: Adam Szilagyi aszilagy@inf.u-szeged.hu

tests/jerry/typedArray-stringify.js

@@ -0,0 +1,23 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+var float_array = new Float32Array([1.125, 5.5, -1.25, -0.0]);
+var int_array = new Int8Array([3, 2, 1, 100, -30])
+var uint_array = new Uint8Array([3, 2, 1, 100, -30])
+var empty_array = new Uint32Array();
+
+assert((JSON.stringify(float_array)) === '{"0":1.125,"1":5.5,"2":-1.25,"3":0}');
+assert((JSON.stringify(int_array)) === '{"0":3,"1":2,"2":1,"3":100,"4":-30}');
+assert((JSON.stringify(uint_array)) === '{"0":3,"1":2,"2":1,"3":100,"4":226}');
+assert((JSON.stringify(empty_array)) === '{}');