woblerr/pgbackrest_exporter v0.12.1 on GitHub

Bump github.com/prometheus/exporter-toolkit from 0.7.1 to 0.7.3 #40.
Fix gracefully pgbackrest_exporter container terminating in k8s #41 by @vrivellino.
Bump infra version #42:
- Bump golangci-lint to v1.50.1. Fixed reported issues.
- Switched TZ to UTC in CI.
Add information about Grafana dashboard #43.
Add deb/rpm packages build to goreleaser #44, #38 by @nunopi . Add goreleaser config testing in CI.
Up pgBackRest version to 2.43 in docker image #45.