docs: enable tooltips

Updates the theme to the latest version to enable tooltips and modifies the db_options.tmpl to show the new role in action.

Closes scylladb/scylladb#21324

.github/dependabot.yml

@@ -4,8 +4,6 @@ updates:
   directory: "/docs"
   schedule:
     interval: "daily"
-  ignore:
-  - dependency-name: "*"
   allow:
   - dependency-name: "sphinx-scylladb-theme"
   - dependency-name: "sphinx-multiversion-scylla"

docs/.gitignore

@@ -1,3 +1,2 @@
 _build
-poetry.lock
 _data

docs/_templates/db_option.tmpl

@@ -3,4 +3,4 @@
 
    {% if type %}* **Type:** ``{{ type }}``{% endif %}
    {% if default %}* **Default value:** ``{{ default }}``{% endif %}
-   {% if liveness %}* :term:`Liveness <Liveness>`: ``{{ liveness }}``{% endif %}
+   {% if liveness %}* :include_tooltip:`Liveness <Liveness>`: ``{{ liveness }}``{% endif %}