Expose public/ API as submodule (#23345)

* model -> public/model

* plugin -> public/plugin

* public/model/utils -> public/utils

* platform/shared/mlog -> public/shared/mlog

* platform/shared/i18n -> public/shared/i18n

* platform/shared/markdown -> public/shared/markdown

* platform/services/timezones -> public/shared/timezones

* channels/einterfaces -> einterfaces

* expose public/ submodule

* go mod tidy

* .github: cache-dependency-path, setup-go-work

* modules-tidy for public/ too

* remove old gomodtidy

server/einterfaces/data_retention.go

@@ -0,0 +1,26 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package einterfaces
+
+import (
+	"github.com/mattermost/mattermost-server/server/public/model"
+)
+
+type DataRetentionInterface interface {
+	GetGlobalPolicy() (*model.GlobalRetentionPolicy, *model.AppError)
+	GetPolicies(offset, limit int) (*model.RetentionPolicyWithTeamAndChannelCountsList, *model.AppError)
+	GetPoliciesCount() (int64, *model.AppError)
+	GetPolicy(policyID string) (*model.RetentionPolicyWithTeamAndChannelCounts, *model.AppError)
+	CreatePolicy(policy *model.RetentionPolicyWithTeamAndChannelIDs) (*model.RetentionPolicyWithTeamAndChannelCounts, *model.AppError)
+	PatchPolicy(patch *model.RetentionPolicyWithTeamAndChannelIDs) (*model.RetentionPolicyWithTeamAndChannelCounts, *model.AppError)
+	DeletePolicy(policyID string) *model.AppError
+	GetTeamsForPolicy(policyID string, offset, limit int) (*model.TeamsWithCount, *model.AppError)
+	AddTeamsToPolicy(policyID string, teamIDs []string) *model.AppError
+	RemoveTeamsFromPolicy(policyID string, teamIDs []string) *model.AppError
+	GetChannelsForPolicy(policyID string, offset, limit int) (*model.ChannelsWithCount, *model.AppError)
+	AddChannelsToPolicy(policyID string, channelIDs []string) *model.AppError
+	RemoveChannelsFromPolicy(policyID string, channelIDs []string) *model.AppError
+	GetTeamPoliciesForUser(userID string, offset, limit int) (*model.RetentionPolicyForTeamList, *model.AppError)
+	GetChannelPoliciesForUser(userID string, offset, limit int) (*model.RetentionPolicyForChannelList, *model.AppError)
+}