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/slashcommands/command_remove.go

@@ -8,6 +8,7 @@ import (
 	"strings"
 
 	"github.com/mattermost/mattermost-server/v5/app"
+	"github.com/mattermost/mattermost-server/v5/app/request"
 	"github.com/mattermost/mattermost-server/v5/model"
 	"github.com/mattermost/mattermost-server/v5/shared/i18n"
 	"github.com/mattermost/mattermost-server/v5/shared/mlog"
@@ -57,15 +58,15 @@ func (*KickProvider) GetCommand(a *app.App, T i18n.TranslateFunc) *model.Command
 	}
 }
 
-func (*RemoveProvider) DoCommand(a *app.App, args *model.CommandArgs, message string) *model.CommandResponse {
-	return doCommand(a, args, message)
+func (*RemoveProvider) DoCommand(a *app.App, c *request.Context, args *model.CommandArgs, message string) *model.CommandResponse {
+	return doCommand(a, c, args, message)
 }
 
-func (*KickProvider) DoCommand(a *app.App, args *model.CommandArgs, message string) *model.CommandResponse {
-	return doCommand(a, args, message)
+func (*KickProvider) DoCommand(a *app.App, c *request.Context, args *model.CommandArgs, message string) *model.CommandResponse {
+	return doCommand(a, c, args, message)
 }
 
-func doCommand(a *app.App, args *model.CommandArgs, message string) *model.CommandResponse {
+func doCommand(a *app.App, c *request.Context, args *model.CommandArgs, message string) *model.CommandResponse {
 	channel, err := a.GetChannel(args.ChannelId)
 	if err != nil {
 		return &model.CommandResponse{
@@ -134,7 +135,7 @@ func doCommand(a *app.App, args *model.CommandArgs, message string) *model.Comma
 		}
 	}
 
-	if err = a.RemoveUserFromChannel(userProfile.Id, args.UserId, channel); err != nil {
+	if err = a.RemoveUserFromChannel(c, userProfile.Id, args.UserId, channel); err != nil {
 		var text string
 		if err.Id == "api.channel.remove_members.denied" {
 			text = args.T("api.command_remove.group_constrained_user_denied")