fix(sqllab): missing estimate action button (#40101)

(cherry picked from commit 2b71d964cc)

superset-frontend/src/SqlLab/components/EstimateQueryCostButton/index.tsx

@@ -113,7 +113,7 @@ const EstimateQueryCostButton = ({
         modalBody={renderModalBody()}
         triggerNode={
           <Button
-            color="primary"
+            color="default"
             variant="text"
             style={{ height: 32, padding: '4px 15px' }}
             onClick={onClickHandler}

superset/sqllab/utils.py

@@ -31,6 +31,7 @@ DATABASE_KEYS = [
     "allow_cvas",
     "allow_dml",
     "allow_run_async",
+    "allows_cost_estimate",
     "allows_subquery",
     "backend",
     "database_name",