Move common tests for sorting algorithms to the base test class (#3782)

* bug fix for CircularBuffer + refactoring + add unit tests

* change Insertion sort to classical implementation + add isSorted function to SortUtils + add SortUtilsRandomGenerator for generating random values and arrays

* little fix

* move all common tests to SortingAlgorithmTest and utilize them

Co-authored-by: Debasish Biswas <debasishbsws.abc@gmail.com>

src/main/java/com/thealgorithms/sorts/SortUtils.java

@@ -112,4 +112,11 @@ final class SortUtils {
                 return false;
         return true;
     }
+
+    static <T extends Comparable<T>> boolean isSorted(List<T> list) {
+        for (int i = 1; i < list.size(); i++)
+            if (less(list.get(i), list.get(i - 1)))
+                return false;
+        return true;
+    }
 }