Enable more revive linter rules (#30608)

Noteable additions:

- `redefines-builtin-id` forbid variable names that shadow go builtins
- `empty-lines` remove unnecessary empty lines that `gofumpt` does not
remove for some reason
- `superfluous-else` eliminate more superfluous `else` branches

Rules are also sorted alphabetically and I cleaned up various parts of
`.golangci.yml`.

models/project/board.go

@@ -110,13 +110,11 @@ func createBoardsForProjectsType(ctx context.Context, project *Project) error {
 	var items []string
 
 	switch project.BoardType {
-
 	case BoardTypeBugTriage:
 		items = setting.Project.ProjectBoardBugTriageType
 
 	case BoardTypeBasicKanban:
 		items = setting.Project.ProjectBoardBasicKanbanType
-
 	case BoardTypeNone:
 		fallthrough
 	default: