Move login related structs and functions to models/login (#17093)

* Move login related structs and functions to models/login

* Fix test

* Fix lint

* Fix lint

* Fix lint of windows

* Fix lint

* Fix test

* Fix test

* Only load necessary fixtures when preparing unit tests envs

* Fix lint

* Fix test

* Fix test

* Fix error log

* Fix error log

* Fix error log

* remove unnecessary change

* fix error log

* merge main branch

models/issue_milestone_test.go

@@ -102,7 +102,7 @@ func TestGetMilestones(t *testing.T) {
 	test := func(sortType string, sortCond func(*Milestone) int) {
 		for _, page := range []int{0, 1} {
 			milestones, _, err := GetMilestones(GetMilestonesOption{
-				ListOptions: ListOptions{
+				ListOptions: db.ListOptions{
 					Page:     page,
 					PageSize: setting.UI.IssuePagingNum,
 				},
@@ -119,7 +119,7 @@ func TestGetMilestones(t *testing.T) {
 			assert.True(t, sort.IntsAreSorted(values))
 
 			milestones, _, err = GetMilestones(GetMilestonesOption{
-				ListOptions: ListOptions{
+				ListOptions: db.ListOptions{
 					Page:     page,
 					PageSize: setting.UI.IssuePagingNum,
 				},