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/project/issue.go

@@ -103,7 +103,7 @@ func MoveIssuesOnProjectBoard(board *Board, sortedIssueIDs map[int64]int64) erro
 	})
 }
 
-func (pb *Board) removeIssues(ctx context.Context) error {
-	_, err := db.GetEngine(ctx).Exec("UPDATE `project_issue` SET project_board_id = 0 WHERE project_board_id = ? ", pb.ID)
+func (b *Board) removeIssues(ctx context.Context) error {
+	_, err := db.GetEngine(ctx).Exec("UPDATE `project_issue` SET project_board_id = 0 WHERE project_board_id = ? ", b.ID)
 	return err
 }