chore: Update CODEOWNERS (#1880)

title says it, the seperate team is not longer necessary imo.

Author: Duologic

.github/CODEOWNERS

@@ -1,8 +1,8 @@
-* @grafana/terraform-provider
+* @grafana/platform-monitoring
 
-/internal/resources/grafana/*_alerting_* @grafana/terraform-provider @grafana/alerting-squad
-/internal/resources/cloud/* @grafana/terraform-provider @grafana/grafana-com-maintainers
-/internal/resources/machinelearning/* @grafana/terraform-provider @grafana/machine-learning
-/internal/resources/oncall/* @grafana/terraform-provider @grafana/grafana-oncall
-/internal/resources/slo/* @grafana/terraform-provider @grafana/slo-squad
-/internal/resources/syntheticmonitoring/* @grafana/terraform-provider @grafana/synthetic-monitoring
+/internal/resources/grafana/*_alerting_*    @grafana/platform-monitoring @grafana/alerting-squad
+/internal/resources/cloud/*                 @grafana/platform-monitoring @grafana/grafana-com-maintainers
+/internal/resources/machinelearning/*       @grafana/platform-monitoring @grafana/machine-learning
+/internal/resources/oncall/*                @grafana/platform-monitoring @grafana/grafana-oncall
+/internal/resources/slo/*                   @grafana/platform-monitoring @grafana/slo-squad
+/internal/resources/syntheticmonitoring/*   @grafana/platform-monitoring @grafana/synthetic-monitoring