without setting function map from alertmanager we receive error:
method=PUT path=/api/v1/provisioning/templates/slack.message status=400
level=error msg="invalid object specification: invalid template: template: :1: function \"toUpper\" not defined"
So for validation we should use the same settings as alertmanager do
for templates internally.
(cherry picked from commit b54da68765)
Co-authored-by: Michał Zielonka <michal.zielonka.8001@gmail.com>
Grot (@grafanabot)
f00f6e3375