Add image url to telegram alert notifier

If public image url of alert is exist add it to the telegram message

fix(packaging): fixed issue in deb package post install script that made it think upgrade was happening, fixes #7403

feat(server side png rendering): added timezone parameter for server side rendering, refactoring PR #7264

Merge branch 'time-offset-to-image' of https://github.com/ryu1-sakai/grafana into ryu1-sakai-time-offset-to-image

* [3743] Adds support for user search based on login or email

* Use query parameter instead

* Use macaron Query() instead

This should have been removed in 06440ef5, but was probably forgotten.

Solves #6718.

feat(packaging): Make config file not part of package to simplify upgrade, made commit always a short sha, changed RESTART_ON_UPGRADE to true by default, #7399, #7227