vmagent: updated dashboard and alert for stream aggregation (#6427)

### Describe Your Changes

Added streaming aggregation section to vmagent dashboards
Added alert for streaming aggregation and deduplication flush timeouts
Removed deprecated compose versions from compose files

Signed-off-by: hagen1778 <roman@victoriametrics.com>
Co-authored-by: hagen1778 <roman@victoriametrics.com>
(cherry picked from commit 2da45a8368)

deployment/docker/alerts-vmagent.yml

@@ -135,3 +135,23 @@ groups:
           summary: "Configuration reload failed for vmagent instance {{ $labels.instance }}"
           description: "Configuration hot-reload failed for vmagent on instance {{ $labels.instance }}.
           Check vmagent's logs for detailed error message."
+
+      - alert: StreamAggrFlushTimeout
+        expr: |
+          increase(vm_streamaggr_flush_timeouts_total[5m]) > 0
+        labels:
+          severity: warning
+        annotations:
+          summary: "Streaming aggregation at \"{{ $labels.job }}\" (instance {{ $labels.instance }}) can't be finished within the configured aggregation interval."
+          description: "Stream aggregation process can't keep up with the load and might produce incorrect aggregation results. Check logs for more details.
+            Possible solutions: increase aggregation interval; aggregate smaller number of series; reduce samples' ingestion rate to stream aggregation."
+
+      - alert: StreamAggrDedupFlushTimeout
+        expr: |
+          increase(vm_streamaggr_dedup_flush_timeouts_total[5m]) > 0
+        labels:
+          severity: warning
+        annotations:
+          summary: "Deduplication \"{{ $labels.job }}\" (instance {{ $labels.instance }}) can't be finished within configured deduplication interval."
+          description: "Deduplication process can't keep up with the load and might produce incorrect results. Check docs https://docs.victoriametrics.com/stream-aggregation/#deduplication and logs for more details.
+            Possible solutions: increase deduplication interval; deduplicate smaller number of series; reduce samples' ingestion rate."

deployment/docker/docker-compose-cluster.yml

@@ -1,4 +1,3 @@
-version: '3.5'
 services:
   #  Metrics collector.
   #  It scrapes targets defined in --promscrape.config

deployment/docker/docker-compose-victorialogs.yml

@@ -1,4 +1,3 @@
-version: "3.5"
 services:
   # Grafana instance configured with VictoriaLogs as datasource
   grafana:

deployment/docker/docker-compose.yml

@@ -1,4 +1,3 @@
-version: "3.5"
 services:
   #  Metrics collector.
   #  It scrapes targets defined in --promscrape.config

deployment/docker/vm-datasource/docker-compose-cluster.yml

@@ -1,4 +1,3 @@
-version: "3.5"
 services:
   grafana:
     container_name: grafana

deployment/docker/vm-datasource/docker-compose.yml

@@ -1,4 +1,3 @@
-version: "3.5"
 services:
   grafana:
     container_name: grafana

docs/CHANGELOG.md

@@ -30,6 +30,10 @@ See also [LTS releases](https://docs.victoriametrics.com/lts-releases/).
 
 ## tip
 
+* FEATURE: [alerts-vmagent](https://github.com/VictoriaMetrics/VictoriaMetrics/blob/master/deployment/docker/alerts-vmagent.yml): add new alerting rules `StreamAggrFlushTimeout` and `StreamAggrDedupFlushTimeout` to notify about issues during stream aggregation.
+* FEATURE: [dashboards/vmagent](https://grafana.com/grafana/dashboards/12683): add row `Streaming aggregation` with panels related to [streaming aggregation](https://docs.victoriametrics.com/stream-aggregation/) process.
+
+
 ## [v1.102.0-rc1](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.102.0-rc1)
 
 Released at 2024-06-07