verdi code show: Add missing code attributes (#5916)

The implementation of `verdi code show` hardcoded the attributes to show.
This led to not all attributes always being shown, since the hard-coded
attributes were just those shared between all `AbstractCode` subclasses.
However, the subclasses have specific attributes that are important as
well.

The command now uses the `get_cli_options` classmethod to get a list
of all attributes relevant to the code type. In principle, each of these
have a corresponding property on the class to retrieve the associated
value so we can use `getattr` to retrieve it. There are exceptions, such
as the `filepath_files` option for the `PortableCode` which is only
needed during setup and not stored permanently, so the `AttributeError`
that can be raised is caught and ignored.

Finally, there are three attributes that are still hard-coded, PK, UUID
and the `entry_point`, since these are not actually part of the list
returned by `get_cli_options` but are shared by all code types and are
useful to display.

aiida/cmdline/commands/cmd_code.py

@@ -224,12 +224,12 @@ def show(code):
     table = []
     table.append(['PK', code.pk])
     table.append(['UUID', code.uuid])
-    table.append(['Label', code.label])
-    table.append(['Description', code.description])
-    table.append(['Default plugin', code.default_calc_job_plugin])
-    table.append(['Prepend text', code.prepend_text])
-    table.append(['Append text', code.append_text])
-
+    table.append(['Type', code.entry_point.name])
+    for key in code.get_cli_options().keys():
+        try:
+            table.append([key.capitalize().replace('_', ' '), getattr(code, key)])
+        except AttributeError:
+            continue
     if is_verbose():
         table.append(['Calculations', len(code.base.links.get_outgoing().all())])