Loki: Migrate HTTP settings to new components (#72831)

* Loki: migrate data source http settings

* Remove unused export

* Update e2e tests

* Update unit test

e2e/various-suite/loki-editor.spec.ts

@@ -8,7 +8,7 @@ const addDataSource = () => {
       'Unable to connect with Loki (Failed to call resource). Please check the server logs for more details.',
     name: dataSourceName,
     form: () => {
-      e2e.components.DataSource.DataSourceHttpSettings.urlInput().type('http://loki-url:3100');
+      e2e().get('#connection-url').type('http://loki-url:3100');
     },
   });
 };

e2e/various-suite/loki-query-builder.spec.ts

@@ -9,7 +9,7 @@ const addDataSource = () => {
       'Unable to connect with Loki (Failed to call resource). Please check the server logs for more details.',
     name: dataSourceName,
     form: () => {
-      e2e.components.DataSource.DataSourceHttpSettings.urlInput().type('http://loki-url:3100');
+      e2e().get('#connection-url').type('http://loki-url:3100');
     },
   });
 };