[ENHANCEMENT] Global nodeSelector

[jonathanlukas]

Describe the use case:

Currently, only each component can have a nodeSelector added. The idea of the global nodeSelector came up as the environment used for a setup did have a dedicated set of nodes to run all camunda components.

This led to adding the nodeSelector property to each individual component.

Describe the enhancement/feature:

It would be great if a global nodeSelector could be defined for such use cases.

Desired outcome and acceptance tests:

The global nodeSelector would be applied unless a component-specific nodeSelector is provided.

[ZiadGoondy]

I would love to try to work on this