fix(infra-gitops): update Gitea image tag to 1.26.2 and remove unused custom template volumes/configurations

flux/infrastructure/infra-gitops/helmrelease-gitea.yaml

@@ -99,14 +99,3 @@ spec:
           value: "redis://:$(REDIS_PASSWORD)@valkey-cluster-headless.infra-data:6379/0?pool_size=100&idle_timeout=180s"
     valkey-cluster:
       enabled: false
-    extraVolumes:
-      - name: gitea-custom-templates-volume
-        configMap:
-          name: gitea-custom-templates
-    extraContainerVolumeMounts:
-      - name: gitea-custom-templates-volume
-        subPath: home.tmpl
-        mountPath: /data/gitea/templates/home.tmpl
-      - name: gitea-custom-templates-volume
-        subPath: extra_links.tmpl
-        mountPath: /data/gitea/templates/custom/extra_links.tmpl