As a NodeObservability Operator user, I would like NodeObservabilityMachineConfig to target only workers matching the label set in the corresponding NodeObservability

NodeObservability CR remains a singleton on the cluster.
Nevertheless, the node selector from NodeObservability is used to enable/disable profiling on a machine config pool that targets only selected nodes.

Out of scope

• Concurrent machine updates in case of multiple NodeObservability CRs
• Precise MachineConfig selection, for nodes which managed by MCP with multiple MCs (not only worker)