fix(sqllab): Table name and schema are encoded twice during fetching table metadata on SQL Lab page. (#13636)

Co-authored-by: dmitry.mudrov <dmitrym.mudrov@agileengine.com>

superset-frontend/src/SqlLab/actions/sqlLab.js

@@ -980,10 +980,7 @@ export function mergeTable(table, query) {
 function getTableMetadata(table, query, dispatch) {
   return SupersetClient.get({
     endpoint: encodeURI(
-      `/api/v1/database/${query.dbId}/table/` +
-        `${encodeURIComponent(table.name)}/${encodeURIComponent(
-          table.schema,
-        )}/`,
+      `/api/v1/database/${query.dbId}/table/${table.name}/${table.schema}/`,
     ),
   })
     .then(({ json }) => {