[eks] Refactor script (#224)

Make the script more readable, mostly by:

- changing slightly the logic,
- using the Product and AutoConfig classes,
- removing the use of functions when unnecessary,
- a little bit of renaming and documentation.

Disabled web.archive.org has also been re-enabled because HTTP retry mechanism has been improved and should handle timeouts a lot better.

releases/eks.json

@@ -43,19 +43,73 @@
   "1.25-eks-3": "2023-05-05",
   "1.24-eks-6": "2023-05-05",
   "1.23-eks-8": "2023-05-05",
+  "1.22-eks-12": "2023-05-05",
+  "1.21-eks-17": "2023-05-05",
+  "1.20-eks-14": "2023-05-05",
   "1.26-eks-1": "2023-04-11",
   "1.25-eks-2": "2023-03-24",
   "1.24-eks-5": "2023-03-24",
   "1.23-eks-7": "2023-03-24",
+  "1.22-eks-11": "2023-03-24",
+  "1.21-eks-16": "2023-03-24",
   "1.25-eks-1": "2023-02-21",
   "1.24-eks-4": "2023-01-27",
   "1.23-eks-6": "2023-01-27",
+  "1.22-eks-10": "2023-01-27",
+  "1.21-eks-15": "2023-01-27",
   "1.24-eks-3": "2022-12-05",
   "1.23-eks-5": "2022-12-05",
+  "1.22-eks-9": "2022-12-05",
+  "1.21-eks-14": "2022-12-05",
+  "1.20-eks-12": "2022-12-05",
   "1.24-eks-2": "2022-11-18",
   "1.23-eks-4": "2022-11-18",
+  "1.22-eks-8": "2022-11-18",
+  "1.21-eks-13": "2022-11-18",
+  "1.20-eks-11": "2022-11-18",
   "1.24-eks-1": "2022-11-15",
   "1.23-eks-3": "2022-11-07",
+  "1.22-eks-7": "2022-11-07",
+  "1.21-eks-12": "2022-11-07",
+  "1.20-eks-10": "2022-11-07",
+  "1.21-eks-11": "2022-10-10",
   "1.23-eks-2": "2022-09-21",
-  "1.23-eks-1": "2022-08-11"
+  "1.22-eks-6": "2022-09-21",
+  "1.20-eks-9": "2022-09-21",
+  "1.22-eks-5": "2022-08-15",
+  "1.21-eks-10": "2022-08-15",
+  "1.20-eks-8": "2022-08-15",
+  "1.19-eks-11": "2022-08-15",
+  "1.23-eks-1": "2022-08-11",
+  "1.22-eks-4": "2022-07-21",
+  "1.21-eks-9": "2022-07-21",
+  "1.20-eks-7": "2022-07-21",
+  "1.22-eks-3": "2022-07-07",
+  "1.21-eks-8": "2022-07-07",
+  "1.22-eks-2": "2022-05-31",
+  "1.21-eks-7": "2022-05-31",
+  "1.20-eks-6": "2022-05-31",
+  "1.19-eks-10": "2022-05-31",
+  "1.21-eks-6": "2022-04-08",
+  "1.20-eks-5": "2022-04-08",
+  "1.19-eks-9": "2022-04-08",
+  "1.22-eks-1": "2022-04-04",
+  "1.20-eks-13": "2022-03-24",
+  "1.21-eks-5": "2022-03-10",
+  "1.20-eks-4": "2022-03-10",
+  "1.19-eks-8": "2022-03-10",
+  "1.21-eks-4": "2021-12-13",
+  "1.21-eks-3": "2021-11-08",
+  "1.20-eks-3": "2021-11-08",
+  "1.19-eks-7": "2021-11-08",
+  "1.21-eks-2": "2021-09-17",
+  "1.19-eks-6": "2021-09-17",
+  "1.20-eks-2": "2021-07-30",
+  "1.21-eks-1": "2021-07-19",
+  "1.19-eks-5": "2021-06-01",
+  "1.20-eks-1": "2021-05-18",
+  "1.19-eks-4": "2021-05-04",
+  "1.19-eks-3": "2021-04-14",
+  "1.19-eks-2": "2021-03-23",
+  "1.19-eks-1": "2021-02-16"
 }