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

jerry-core/ecma/builtin-objects/ecma-builtin-handlers.h

@@ -16,22 +16,21 @@
 #ifndef ECMA_BUILTIN_HANDLERS_H
 #define ECMA_BUILTIN_HANDLERS_H
 
-#include "ecma-globals.h"
-
-#if JERRY_ESNEXT
-
 #include "ecma-builtins.h"
+#include "ecma-globals.h"
 #include "ecma-helpers.h"
 #include "ecma-promise-object.h"
 #include "ecma-proxy-object.h"
 
 typedef enum
 {
+  /** @cond doxygen_suppress */
   ECMA_NATIVE_HANDLER_START = 0,
 #define ECMA_NATIVE_HANDLER(id, handler, length) id,
 #include "ecma-builtin-handlers.inc.h"
 #undef ECMA_NATIVE_HANDLER
   ECMA_NATIVE_HANDLER__COUNT
+  /** @endcond */
 } ecma_native_handler_id_t;
 
 typedef enum
@@ -49,6 +48,4 @@ typedef enum
 ecma_builtin_handler_t ecma_builtin_handler_get (ecma_native_handler_id_t id);
 uint8_t ecma_builtin_handler_get_length (ecma_native_handler_id_t id);
 
-#endif /* JERRY_ESNEXT */
-
 #endif /* !ECMA_BUILTIN_HANDLERS_H */