Set last login when activating account (#21731)
Set last login when activating account (#21731)

Fix #21698.

Set the last login time to the current time when activating the user
successfully.

Co-authored-by: Lunny Xiao <0b0704cdf8f0790c6f1df1f74c38be95a8917ed2@gmail.com>
go-gitea/gitea,go-gitea/gitea,go-gitea/gitea