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/docker_hub.py

@@ -1,14 +1,9 @@
-import sys
-
 from common import dates, endoflife, http, releasedata
 
 """Fetches releases from the Docker Hub API.
 
 Unfortunately images creation date cannot be retrieved, so we had to use the tag_last_pushed field instead."""
 
-METHOD = "docker_hub"
-
-
 def fetch_releases(p: releasedata.ProductData, c: endoflife.AutoConfig, url: str) -> None:
     data = http.fetch_url(url).json()
 
@@ -22,8 +17,6 @@ def fetch_releases(p: releasedata.ProductData, c: endoflife.AutoConfig, url: str
         fetch_releases(p, c, data["next"])
 
 
-p_filter = sys.argv[1] if len(sys.argv) > 1 else None
-m_filter = sys.argv[2] if len(sys.argv) > 2 else None
-for config in endoflife.list_configs(p_filter, METHOD, m_filter):
+for config in endoflife.list_configs_from_argv():
     with releasedata.ProductData(config.product) as product_data:
         fetch_releases(product_data, config, f"https://hub.docker.com/v2/repositories/{config.url}/tags?page_size=100&page=1")