Growth spike: Get latest MM version (#19366)

* tools updates

* Revert "tools updates"

This reverts commit 6293297b55803c5a263e200ebd80192899666ae9.

* new endpoint to fetch the latest release information

* adding unit tests

* fixing tests and adding check for github response

* error translations

* fixing translations

* chaning error log

* changing cache size

* empty strings for translations

* changing size to 1

Co-authored-by: Benjamin Cooke <benjamincooke@Benjamins-MacBook-Pro.local>
Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

model/github_release.go

@@ -0,0 +1,26 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package model
+
+import (
+	"net/http"
+)
+
+type GithubReleaseInfo struct {
+	Id          int    `json:"id"`
+	TagName     string `json:"tag_name"`
+	Name        string `json:"name"`
+	CreatedAt   string `json:"created_at"`
+	PublishedAt string `json:"published_at"`
+	Body        string `json:"body"`
+	Url         string `json:"html_url"`
+}
+
+func (g *GithubReleaseInfo) IsValid() *AppError {
+	if g.Id == 0 {
+		return NewAppError("GithubReleaseInfo.IsValid", "model.github_release_info.is_valid.id.app_error", nil, "", http.StatusInternalServerError)
+	}
+
+	return nil
+}