Fix missing updated time on migrated issues and comments (#9744)

* Fix missing updated time on migrated issues and comments

* Fix testing and missing updated on migrating pullrequest

Co-authored-by: Antoine GIRARD <sapk@users.noreply.github.com>

modules/migrations/base/comment.go

@@ -14,6 +14,7 @@ type Comment struct {
 	PosterName  string
 	PosterEmail string
 	Created     time.Time
+	Updated     time.Time
 	Content     string
 	Reactions   *Reactions
 }

modules/migrations/base/issue.go

@@ -19,6 +19,7 @@ type Issue struct {
 	State       string // closed, open
 	IsLocked    bool
 	Created     time.Time
+	Updated     time.Time
 	Closed      *time.Time
 	Labels      []*Label
 	Reactions   *Reactions

modules/migrations/base/pullrequest.go

@@ -21,6 +21,7 @@ type PullRequest struct {
 	Milestone      string
 	State          string
 	Created        time.Time
+	Updated        time.Time
 	Closed         *time.Time
 	Labels         []*Label
 	PatchURL       string