Add more linters to improve code readability (#19989)

Add nakedret, unconvert, wastedassign, stylecheck and nolintlint linters to improve code readability

- nakedret - https://github.com/alexkohler/nakedret - nakedret is a Go static analysis tool to find naked returns in functions greater than a specified function length.
- unconvert - https://github.com/mdempsky/unconvert - Remove unnecessary type conversions
- wastedassign - https://github.com/sanposhiho/wastedassign -  wastedassign finds wasted assignment statements.
- notlintlint -  Reports ill-formed or insufficient nolint directives
- stylecheck - https://staticcheck.io/docs/checks/#ST - keep style consistent
  - excluded: [ST1003 - Poorly chosen identifier](https://staticcheck.io/docs/checks/#ST1003) and [ST1005 - Incorrectly formatted error string](https://staticcheck.io/docs/checks/#ST1005)

models/db/engine.go

@@ -285,5 +285,5 @@ func DeleteAllRecords(tableName string) error {
 // GetMaxID will return max id of the table
 func GetMaxID(beanOrTableName interface{}) (maxID int64, err error) {
 	_, err = x.Select("MAX(id)").Table(beanOrTableName).Get(&maxID)
-	return
+	return maxID, err
 }

models/db/index.go

@@ -44,7 +44,7 @@ func UpsertResourceIndex(ctx context.Context, tableName string, groupID int64) (
 	default:
 		return fmt.Errorf("database type not supported")
 	}
-	return
+	return err
 }
 
 var (

models/db/list_options.go

@@ -58,7 +58,7 @@ func (opts *ListOptions) GetSkipTake() (skip, take int) {
 func (opts *ListOptions) GetStartEnd() (start, end int) {
 	start, take := opts.GetSkipTake()
 	end = start + take
-	return
+	return start, end
 }
 
 // SetDefaultValues sets default values

models/db/sql_postgres_with_schema.go

@@ -44,7 +44,7 @@ func (d *postgresSchemaDriver) Open(name string) (driver.Conn, error) {
 		_, err := execer.Exec(`SELECT set_config(
 			'search_path',
 			$1 || ',' || current_setting('search_path'),
-			false)`, []driver.Value{schemaValue}) //nolint
+			false)`, []driver.Value{schemaValue})
 		if err != nil {
 			_ = conn.Close()
 			return nil, err