Log filter doesn't work if the labelKeys referenced doesn't exist in RHOCP 4

Issue

• The "OpenShift Console > Observe > Logs" continues showing in the "Filters" the filter matching a default labelKey that doesn't exist anymore, returning no data if it's used.
• It was configured different labelKeys on the collector for when log forwarding to Loki, the result is that the "OpenShift Console > Observe > Logs" continues showing the filter matching a labelKey that doesn't exist, then, if it's used, the result is not data and the new labelKeys are not listed as an option to filter.
• "No datapoints found" in the "OpenShift Console > Observe > Logs" when querying the application logs after configuring the clusterLogForwarder for pruning all the default "kubernetes" fields.