feat: remove 'api-server-name' configuration

The base url is already here for this.

cubicweb_api/site_cubicweb.py

@@ -27,15 +27,4 @@
             "level": 2,
         },
     ),
-    (
-        "api-server-name",
-        {
-            "type": "string",
-            "default": None,
-            "help": "The base url to use for openapi validation. "
-            "Set this to the CubicWeb base url if openapi cannot find the server.",
-            "group": "api",
-            "level": 2,
-        },
-    ),
 )

cubicweb_api/util.py

@@ -65,23 +65,8 @@
     :return: The configured server name or the CubicWeb base url
     :raise ConfigurationError if the name set in config is not valid
     """
-    repo = get_cw_repo(config)
-    with repo.internal_cnx() as cnx:
-        server_name: str = repo.get_option_value("api-server-name") or cnx.base_url()
-    match = re.match("^[a-zA-Z0-9-_@.&+!*(),/:]{1,60}$", server_name)
-    if match:
-        return server_name
-    else:
-        if len(server_name) > 60:
-            raise ConfigurationError(
-                f"api-server-name '{server_name}' is too long. "
-                "Max size allowed is 60 characters. "
-                f"Current size is {len(server_name)}."
-            )
-        raise ConfigurationError(
-            f"api-server-name '{server_name}' contains invalid characters. "
-            "Allowed characters are: a-zA-Z0-9-_@.&+!*(),/:"
-        )
+    cwconfig = get_cw_all_in_one_config(config)
+    return cwconfig.option_value('base-url')
 
 
 def get_api_path_prefix(config: Configurator) -> str: