Fix Typedarray.slice fastpath when the content type is matching (#5177)

This patch fixes #4888.

The implementation is based on PR #4898, only resolved the conflicts and
applied requested changes.

Co-authored-by: Robert Fancsik robert.fancsik@h-lab.eu
JerryScript-DCO-1.0-Signed-off-by: Gergo Csizi gergocs@inf.u-szeged.hu

tests/jerry/array-slice.js

@@ -0,0 +1,33 @@
+// 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.
+
+let buf = new ArrayBuffer(10);
+let a1 = new Int8Array(buf, 0, 5);
+a1.fill(1);
+a1.constructor = {
+    [Symbol.species]: function (len) {
+        return new Int8Array(buf, 5, 5);
+    }
+};
+let a2 = a1.slice(2,4);
+res = new Int8Array(buf, 0, 10);
+
+//Expected: 1, 1, 1, 1, 1, 1, 1, 0, 0, 0
+for (let i = 0; i < 10; i++) {
+    if (i < 7) {
+        assert(res[i] === 1);
+    } else {
+        assert(res[i] === 0);
+    }
+}