Panel Menus: PoC

[gtk-grafana]

Waiting on https://github.com/grafana/grafana/issues/96865 before taking out of draft, I can remove the css hacks and wrapping element if that proposal is accepted.

Fixes: https://github.com/grafana/explore-logs/issues/890

Adds VizPanelMenu to all time-series Adds link to explore to VizPanelMenu Adds support for addToExplorations feature in VizPanelMenu

TODO:

• Do we want menu in logs/table panel?
• Do we want investigations link in LogsVolume and/or logs/table panel?
• Add to dashboard is not yet provided by core to plugins, but work was started in https://github.com/grafana/grafana/pull/94458

With investigations enabled:

Without investigations enabled: