Move db related basic functions to models/db (#17075)

* Move db related basic functions to models/db

* Fix lint

* Fix lint

* Fix test

* Fix lint

* Fix lint

* revert unnecessary change

* Fix test

* Fix wrong replace string

* Use *Context

* Correct committer spelling and fix wrong replaced words

Co-authored-by: zeripath <art27@cantab.net>

integrations/api_admin_org_test.go

@@ -11,6 +11,7 @@ import (
 	"testing"
 
 	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/models/db"
 	api "code.gitea.io/gitea/modules/structs"
 
 	"github.com/stretchr/testify/assert"
@@ -42,7 +43,7 @@ func TestAPIAdminOrgCreate(t *testing.T) {
 		assert.Equal(t, org.Location, apiOrg.Location)
 		assert.Equal(t, org.Visibility, apiOrg.Visibility)
 
-		models.AssertExistsAndLoadBean(t, &models.User{
+		db.AssertExistsAndLoadBean(t, &models.User{
 			Name:      org.UserName,
 			LowerName: strings.ToLower(org.UserName),
 			FullName:  org.FullName,