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.

matrix-synapse/templates/matrix-synapse.sfs.yaml

@@ -65,14 +65,7 @@ spec:
             timeoutSeconds: 5
             failureThreshold: 30
           resources:
-            requests:
-              memory: "{{ .Values.matrix.resources.requests.memory }}"
-              cpu: "{{ .Values.matrix.resources.requests.cpu }}"
-              ephemeral-storage: "{{ .Values.matrix.resources.requests.ephemeralStorage }}"
-            limits:
-              memory: "{{ .Values.matrix.resources.limits.memory }}"
-              cpu: "{{ .Values.matrix.resources.limits.cpu }}"
-              ephemeral-storage: "{{ .Values.matrix.resources.limits.ephemeralStorage }}"
+            {{- include "matrix-synapse.resources" .Values.matrix.resources | nindent 12 }}
           volumeMounts:
             - name: matrix-synapse-volume
               mountPath: /data