opentelemetry: Unify index names in environments

- {staging,production}-swh-logs
- {staging,production}-system-logs

This will fix the misnaming in production [1]. The data stream 'logs-*-*' pattern exists
which prevented the index name to be correctly built (and historically, the staging ones
were named differently too so the issue was not detected earlier).

[1]
```
curl -s ${ES_SERVER}/_cat/indices | grep "staging\|production"
...
green open  .ds-logs-swh-production-2023.05.16-000001    OMdrZ9DXRZ2t2SP4PEhwVA 1 1  5398438      0   2.1gb     1gb
green open  .ds-logs-system-production-2023.05.16-000001 WcV164JHSgOIOWjVUddeHg 1 1
6097451      0   3.4gb     2gb
...
```

Refs. swh/infra/sysadm-environment#4524

cluster-configuration/templates/otlp-collector/_collector.tpl

@@ -3,8 +3,8 @@
 # in the argocd application defined in application.yaml
 {{ if .Values.otlpCollector.enabled -}}
 {{- $environment := get .Values "environment" }}
-{{- $logs_swh := .Values.otlpCollector.indexes.swh | default ( print "logs-swh-" $environment ) -}}
-{{- $logs_system := .Values.otlpCollector.indexes.system | default ( print "logs-system-" $environment ) -}}
+{{- $logs_swh := .Values.otlpCollector.indexes.swh | default ( print $environment "-swh-logs" ) -}}
+{{- $logs_system := .Values.otlpCollector.indexes.system | default ( print $environment "-system-logs" ) -}}
 {{- $activate_debug := .Values.otlpCollector.debug -}}
 ---
 mode: daemonset

cluster-configuration/values/archive-production-rke2.yaml

@@ -23,9 +23,6 @@ certManager:
 otlpCollector:
   enabled: true
   debug: false
-  indexes:
-    swh: logs-swh-production
-    system: logs-system-production
   resources:
     cpu: 1024m
     memory: 16Gi

cluster-configuration/values/archive-staging-rke2.yaml

@@ -23,11 +23,6 @@ certManager:
 otlpCollector:
   enabled: true
   debug: false
-  indexes:
-    # misnamed: should be logs-{swh,system}-staging, kept for retro compatibility with
-    # development tryouts
-    swh: staging-logs
-    system: staging-system-logs
   resources:
     cpu: 256m
     memory: 2Gi