[UI] Helm release filter is broken - show duplicates & does not filter

[rtpro]

• [x] When selecting a namespace in the namespace filter list, the table shows releases of other namespaces as well

• [x] When filtering a namespace, the list shows duplicate items. Issue reproduction in the video https://www.loom.com/share/c1376300101f45e9a09d7ddd2c428389