Align custom scripts with generic scripts (#445)

Align custom scripts with generic scripts, making them configurable. This has a few advantages:

- script code is more unified,
- no more hard-coded method names in scripts, which is less error prone and make it easier to rename scripts,
- no more hard coded product names in scripts, which is less error prone and make it easier to rename products,
- less hard-coded URLs and regexes in scripts, which makes auto-configuration more expressive / updatable,

Also added method `endoflife.list_configs_from_argv()` so that it is easier to manipulate scripts arguments.

src/typo3.py

@@ -1,11 +1,12 @@
-from common import dates, http, releasedata
+from common import dates, endoflife, http, releasedata
 
-with releasedata.ProductData("typo3") as product_data:
-    data = http.fetch_url("https://get.typo3.org/api/v1/release/").json()
-    for v in data:
-        if v['type'] == 'development':
-            continue
+for config in endoflife.list_configs_from_argv():
+    with releasedata.ProductData(config.product) as product_data:
+        data = http.fetch_url(config.url).json()
+        for v in data:
+            if v['type'] == 'development':
+                continue
 
-        version = v["version"]
-        date = dates.parse_datetime(v["date"], to_utc=False)  # utc kept for now for backwards compatibility
-        product_data.declare_version(version, date)
+            version = v["version"]
+            date = dates.parse_datetime(v["date"], to_utc=False)  # utc kept for now for backwards compatibility
+            product_data.declare_version(version, date)