feat: separate port for hook metrics (flant#190)

* feat: separate port for hook metrics

- hook-metrics-listen-port flag to specify a listen port for hook metrics
- fix labels cardinality for kube_event_manager metrics

Merge pull request flant#175 from flant/fix_replace_zombie_reaper_wit…

…h_tini

fix: use tini for zombie reaping

Merge pull request flant#165 from flant/feat_metrics_from_hooks

feat: allow to send metrics from hooks

Merge pull request flant#129 from flant/feat_script_ci_coverage_set_p…

…refix

feat: configurable prefix flag for cc-test-reporter

Merge pull request flant#103 from flant/fix_delay_between_tasks

fix: delay between tasks

Merge pull request flant#98 from flant/beta_6

feat: Synchronization mode, snapshots, multi-queues, yaml config

Merge pull request flant#29 from zuzzas/single-object

Allow subscribing to Kubernetes events by concrete object name

Merge pull request flant#27 from zuzzas/listen-addr

Add an option to specify listening address for HTTP server

Merge pull request flant#23 from flant/go_modules

Go modules

Merge pull request flant#18 from anoopwebs/support-for-autoscaling-event

add autoscaling kind