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.

update.py

@@ -87,7 +87,7 @@ def __run_script(product: ProductFrontmatter, config: AutoConfig, summary: Scrip
     logging.info(f"start running {script} for {config}")
     start = time.perf_counter()
     # timeout is handled in child scripts
-    child = subprocess.run([sys.executable, script, config.product, str(config.url)])
+    child = subprocess.run([sys.executable, script, config.product,  str(config.method), str(config.url)])
     success = child.returncode == 0
     elapsed_seconds = time.perf_counter() - start