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>

einterfaces/ldap.go

@@ -4,11 +4,12 @@
 package einterfaces
 
 import (
+	"github.com/mattermost/mattermost-server/v5/app/request"
 	"github.com/mattermost/mattermost-server/v5/model"
 )
 
 type LdapInterface interface {
-	DoLogin(id string, password string) (*model.User, *model.AppError)
+	DoLogin(c *request.Context, id string, password string) (*model.User, *model.AppError)
 	GetUser(id string) (*model.User, *model.AppError)
 	GetUserAttributes(id string, attributes []string) (map[string]string, *model.AppError)
 	CheckPassword(id string, password string) *model.AppError
@@ -21,7 +22,7 @@ type LdapInterface interface {
 	MigrateIDAttribute(toAttribute string) error
 	GetGroup(groupUID string) (*model.Group, *model.AppError)
 	GetAllGroupsPage(page int, perPage int, opts model.LdapGroupSearchOpts) ([]*model.Group, int, *model.AppError)
-	FirstLoginSync(user *model.User, userAuthService, userAuthData, email string) *model.AppError
+	FirstLoginSync(c *request.Context, user *model.User, userAuthService, userAuthData, email string) *model.AppError
 	UpdateProfilePictureIfNecessary(model.User, model.Session)
 	GetADLdapIdFromSAMLId(authData string) string
 	GetSAMLIdFromADLdapId(authData string) string