SQL Expressions: Add sql expression specific timeout and output limit (#104834)

Adds settings for SQL expressions:
 sql_expression_cell_output_limit

Set the maximum number of cells that can be returned from a SQL expression. Default is 100000.

sql_expression_timeout

The duration a SQL expression will run before being cancelled. The default is 10s.

pkg/expr/service_test.go

@@ -206,8 +206,8 @@ func TestSQLExpressionCellLimitFromConfig(t *testing.T) {
 			cmdNode := node.(*CMDNode)
 			sqlCmd := cmdNode.Command.(*SQLCommand)
 
-			// Verify the SQL command has the correct limit
-			require.Equal(t, tt.expectedLimit, sqlCmd.limit, "SQL command has incorrect cell limit")
+			// Verify the SQL command has the correct inputLimit
+			require.Equal(t, tt.expectedLimit, sqlCmd.inputLimit, "SQL command has incorrect cell limit")
 		})
 	}
 }