Panels: Add support for panels with no padding (#20012)

* Panels: Added support to set panel padding to zero

* WIP: fullChromeControl work

* Tweaks to header position

* Reverted some overlay mechanic and now back to no title only

* Fixed test

* Fixed transparent flag

* Added show title

* Added font weight to value

* Reverted back to no padding option

* Fixed issue with border and width and height

packages/grafana-data/src/types/panel.ts

@@ -74,6 +74,7 @@ export class PanelPlugin<TOptions = any> extends GrafanaPlugin<PanelPluginMeta>
   defaults?: TOptions;
   onPanelMigration?: PanelMigrationHandler<TOptions>;
   onPanelTypeChanged?: PanelTypeChangedHandler<TOptions>;
+  noPadding?: boolean;
 
   /**
    * Legacy angular ctrl.  If this exists it will be used instead of the panel
@@ -95,6 +96,11 @@ export class PanelPlugin<TOptions = any> extends GrafanaPlugin<PanelPluginMeta>
     return this;
   }
 
+  setNoPadding() {
+    this.noPadding = true;
+    return this;
+  }
+
   /**
    * This function is called before the panel first loads if
    * the current version is different than the version that was saved.