Compute memory/ephemeral-storage limits from requests, drop default CPU limits

Every chart now renders its container resources through a duplicated
_helpers.tpl helper (reference implementation in template-chart): requests
ship as chart defaults, missing memory and ephemeral-storage limits are
computed as resources.limitFactor x the request (default 3, satisfactory
keeps 2 to preserve its previously published 8Gi limit), an explicitly set
limit always wins, and a CPU limit is only rendered when set explicitly.
Fixed limit defaults are removed from all values.yaml files; teamspeak-server
gains a values-driven resources block instead of hardcoded template values.
Major version bump for all published charts.

voucher-vault/templates/voucher-vault.sfs.yaml

@@ -59,7 +59,7 @@ spec:
             {{- toYaml .Values.voucherVault.startupProbe | nindent 12 }}
           {{- end }}
           resources:
-            {{- toYaml .Values.voucherVault.resources | nindent 12 }}
+            {{- include "voucher-vault.resources" .Values.voucherVault.resources | nindent 12 }}
           securityContext:
             {{- toYaml .Values.voucherVault.securityContext.container | nindent 12 }}
           volumeMounts: