[monitoring] fix vpa for vmagent delete resources (#820)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Chores**
- Updated resource allocation settings for monitoring agents by removing
predefined CPU and memory limits.
- Added an option to specify separate resource settings for the config
reloader component.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/system/monitoring-agents/templates/vmagent.yaml

@@ -20,12 +20,8 @@ spec:
   additionalScrapeConfigs:
     name: additional-scrape-configs
     key: prometheus-additional.yaml
-  resources:
-    limits:
-      memory: 1024Mi
-    requests:
-      cpu: 50m
-      memory: 768Mi
+  resources: {}
+  configReloaderResources: {}
   #statefulMode: true
   #statefulStorage:
   #  volumeClaimTemplate: