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/issues/comment.go

@@ -315,7 +315,7 @@ func (c *Comment) LoadIssueCtx(ctx context.Context) (err error) {
 		return nil
 	}
 	c.Issue, err = GetIssueByID(ctx, c.IssueID)
-	return
+	return err
 }
 
 // BeforeInsert will be invoked by XORM before inserting a record
@@ -627,7 +627,7 @@ func (c *Comment) LoadResolveDoer() (err error) {
 			err = nil
 		}
 	}
-	return
+	return err
 }
 
 // IsResolved check if an code comment is resolved
@@ -955,7 +955,7 @@ func createIssueDependencyComment(ctx context.Context, doer *user_model.User, is
 		DependentIssueID: issue.ID,
 	}
 	_, err = CreateCommentCtx(ctx, opts)
-	return
+	return err
 }
 
 // CreateCommentOptions defines options for creating comment
@@ -1350,7 +1350,7 @@ func CreatePushPullComment(ctx context.Context, pusher *user_model.User, pr *Pul
 
 	comment, err = CreateComment(ops)
 
-	return
+	return comment, err
 }
 
 // CreateAutoMergeComment is a internal function, only use it for CommentTypePRScheduledToAutoMerge and CommentTypePRUnScheduledToAutoMerge CommentTypes
@@ -1372,7 +1372,7 @@ func CreateAutoMergeComment(ctx context.Context, typ CommentType, pr *PullReques
 		Repo:  pr.BaseRepo,
 		Issue: pr.Issue,
 	})
-	return
+	return comment, err
 }
 
 // getCommitsFromRepo get commit IDs from repo in between oldCommitID and newCommitID
@@ -1434,7 +1434,7 @@ func getCommitIDsFromRepo(ctx context.Context, repo *repo_model.Repository, oldC
 		}
 	}
 
-	return
+	return commitIDs, isForcePush, err
 }
 
 type commitBranchCheckItem struct {