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/string-prototype-codepointat.js

@@ -0,0 +1,54 @@
+// 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 str = "A🌃B\uD800";
+var obj = {};
+
+// Test with normal inputs
+assert(str.codePointAt(0) === 65);
+assert(str.codePointAt(1) === 127747);
+assert(str.codePointAt(2) === 57091);
+assert(str.codePointAt(3) === 66);
+assert(str.codePointAt(4) === 55296);
+
+// Test with string
+assert(str.codePointAt("a") === 65);
+assert(str.codePointAt("B") === 65);
+
+// Test with object
+assert(str.codePointAt(obj) === 65);
+
+// Test with NaN
+assert(str.codePointAt(NaN) === 65);
+
+// Test when the input >= length
+assert(str.codePointAt(5) === undefined);
+assert(str.codePointAt(10) === undefined);
+
+// Test witn negative
+assert(str.codePointAt(-1) === undefined);
+assert(str.codePointAt(-5) === undefined);
+assert(str.codePointAt(-0) === 65);
+
+// Test with undefined and +/- Infinity
+assert(str.codePointAt(undefined) === 65);
+assert(str.codePointAt(Infinity) === undefined);
+assert(str.codePointAt(-Infinity) === undefined);
+
+// Test with boolean
+assert(str.codePointAt(true) === 127747);
+assert(str.codePointAt(false) === 65);
+
+// Test when input > UINT32_MAX
+assert(str.codePointAt(4294967299) === undefined);