Working on refactoring jobs service (#19205)

* Working on refactoring jobs service

* Making more consistent with the previous existing code

* Remove no longer needed functions

* Making a base PeridicScheduler to use it in most of the schedulers implementations

* Removing accidental complexity from on of the jobs

* Removing accidental complexity from expirynotify

* Fixing compilation from previous commit

* Remove accidental complexity from the export_delete job

* Simplifying the workers by making a reusable worker

* Using simple worker for export_delete job

* Simpliying export process job

* Simpliying extract content job

* Simpliying import delete job

* Simpliying import process job

* Simpliying product noticies job

* Simpliying fix crt channel unreads job (only removing the uneeded register function)

* Simpliying migrations job (only removing the uneeded register function)

* fixup

* Simpliying plugins job (only removing the uneeded register function)

* Simpliying bleve indexing job (only removing the uneeded register function)

* Simpliying resend invitation email job (only removing the uneeded register function)

* Fixing tests

* Simplifying migration tests infrastructure

* Adding missed license to files

* Adding an empty file to imports package to ensure this package exist even without enterprise repo

* Regenerating einterfaces mocks

* Adding missed license to files

* Updating i18n/en.json file

* help fixing enterprise tests compilation

* Adding new DailyScheduler

* Fixing typo and changing the waitTime type for periodic sechduler

* Making the daily scheduler more generic

* Adding comments to clarify not used parameters in interface scheduler interface implementations

* Using merror to handle multiple errors in jobs workers

* Fixing linter errors

* Addressing PR review comments

* Reverting go.tools.mod changes

* Removing the static check for worker type in the model (moving it to the insertion of new jobs

* Moving migrations job to the jobs directory

* Fixing (and improving a bit) tests

* Apply suggestions from code review

Co-authored-by: Doug Lauder <wiggin77@warpmail.net>

* Fixing enterprise tests

* Removing unneeded InitWorkers/InitSchedulers calls

* Fix expirenotify job when error happens

* Fixing govet errors

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>
Co-authored-by: Doug Lauder <wiggin77@warpmail.net>

imports/placeholder.go

@@ -1,42 +1,8 @@
 // Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
 // See LICENSE.txt for license information.
 
+// As part of the enterprise code integration machinery a go file is copied to
+// this package, this file ensure the existence of the package anyway, allowing
+// the rest of the code to import the package when enterprise code is there and
+// when is not.
 package imports
-
-import (
-	// This is a placeholder so this package can be imported in Team Edition when it will be otherwise empty.
-	_ "github.com/mattermost/mattermost-server/v6/migrations"
-
-	// This is a placeholder so this package can be imported in Team Edition when it will be otherwise empty.
-	_ "github.com/mattermost/mattermost-server/v6/plugin/scheduler"
-
-	// This is a placeholder so this package can be imported in Team Edition when it will be otherwise empty.
-	_ "github.com/mattermost/mattermost-server/v6/services/searchengine/bleveengine/indexer"
-
-	// This is a placeholder so this package can be imported in Team Edition when it will be otherwise empty.
-	_ "github.com/mattermost/mattermost-server/v6/jobs/expirynotify"
-
-	// This is a placeholder so this package can be imported in Team Edition when it will be otherwise empty.
-	_ "github.com/mattermost/mattermost-server/v6/jobs/active_users"
-
-	// This is a placeholder so this package can be imported in Team Edition when it will be otherwise empty.
-	_ "github.com/mattermost/mattermost-server/v6/jobs/product_notices"
-
-	// This is a placeholder so this package can be imported in Team Edition when it will be otherwise empty.
-	_ "github.com/mattermost/mattermost-server/v6/jobs/import_process"
-
-	// This is a placeholder so this package can be imported in Team Edition when it will be otherwise empty.
-	_ "github.com/mattermost/mattermost-server/v6/jobs/import_delete"
-
-	// This is a placeholder so this package can be imported in Team Edition when it will be otherwise empty.
-	_ "github.com/mattermost/mattermost-server/v6/jobs/export_process"
-
-	// This is a placeholder so this package can be imported in Team Edition when it will be otherwise empty.
-	_ "github.com/mattermost/mattermost-server/v6/jobs/export_delete"
-
-	// This is a placeholder so this package can be imported in Team Edition when it will be otherwise empty.
-	_ "github.com/mattermost/mattermost-server/v6/jobs/resend_invitation_email"
-
-	// This is a placeholder so this package can be imported in Team Edition when it will be otherwise empty.
-	_ "github.com/mattermost/mattermost-server/v6/jobs/extract_content"
-)