Move user related model into models/user (#17781)

* Move user related model into models/user

* Fix lint for windows

* Fix windows lint

* Fix windows lint

* Move some tests in models

* Merge

models/issue_dependency_test.go

@@ -8,6 +8,7 @@ import (
 	"testing"
 
 	"code.gitea.io/gitea/models/unittest"
+	user_model "code.gitea.io/gitea/models/user"
 
 	"github.com/stretchr/testify/assert"
 )
@@ -16,7 +17,7 @@ func TestCreateIssueDependency(t *testing.T) {
 	// Prepare
 	assert.NoError(t, unittest.PrepareTestDatabase())
 
-	user1, err := GetUserByID(1)
+	user1, err := user_model.GetUserByID(1)
 	assert.NoError(t, err)
 
 	issue1, err := GetIssueByID(1)