Migrate to stateless app.App (#17542)

* add request context

* move initialialization to server

* use app interface instead of global app functions

* remove app context from webconn

* cleanup

* remove duplicated services

* move context to separate package

* remove finalize init method and move content to NewServer function

* restart workers and schedulers after adding license for tests

* reflect review comments

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

app/authentication.go

@@ -7,6 +7,7 @@ import (
 	"net/http"
 	"strings"
 
+	"github.com/mattermost/mattermost-server/v5/app/request"
 	"github.com/mattermost/mattermost-server/v5/model"
 	"github.com/mattermost/mattermost-server/v5/shared/mfa"
 	"github.com/mattermost/mattermost-server/v5/utils"
@@ -126,13 +127,13 @@ func (a *App) checkUserPassword(user *model.User, password string) *model.AppErr
 	return nil
 }
 
-func (a *App) checkLdapUserPasswordAndAllCriteria(ldapId *string, password string, mfaToken string) (*model.User, *model.AppError) {
+func (a *App) checkLdapUserPasswordAndAllCriteria(c *request.Context, ldapId *string, password string, mfaToken string) (*model.User, *model.AppError) {
 	if a.Ldap() == nil || ldapId == nil {
 		err := model.NewAppError("doLdapAuthentication", "api.user.login_ldap.not_available.app_error", nil, "", http.StatusNotImplemented)
 		return nil, err
 	}
 
-	ldapUser, err := a.Ldap().DoLogin(*ldapId, password)
+	ldapUser, err := a.Ldap().DoLogin(c, *ldapId, password)
 	if err != nil {
 		err.StatusCode = http.StatusUnauthorized
 		return nil, err
@@ -229,7 +230,7 @@ func checkUserNotBot(user *model.User) *model.AppError {
 	return nil
 }
 
-func (a *App) authenticateUser(user *model.User, password, mfaToken string) (*model.User, *model.AppError) {
+func (a *App) authenticateUser(c *request.Context, user *model.User, password, mfaToken string) (*model.User, *model.AppError) {
 	license := a.Srv().License()
 	ldapAvailable := *a.Config().LdapSettings.Enable && a.Ldap() != nil && license != nil && *license.Features.LDAP
 
@@ -239,7 +240,7 @@ func (a *App) authenticateUser(user *model.User, password, mfaToken string) (*mo
 			return user, err
 		}
 
-		ldapUser, err := a.checkLdapUserPasswordAndAllCriteria(user.AuthData, password, mfaToken)
+		ldapUser, err := a.checkLdapUserPasswordAndAllCriteria(c, user.AuthData, password, mfaToken)
 		if err != nil {
 			err.StatusCode = http.StatusUnauthorized
 			return user, err