allow specifying the nodeSelector for the init jobs

[elangelo]

Fixes #

Motivation

When deploying pulsar to an AKS cluster with windows nodepools i was unable to specify that the Jobs of the initalize release had to run on linux nodes. With the change i can now specify a node selector for the init jobs.

Modifications

add nodeSelector on pulsar_init and bookie_init

Verifying this change

• [ ] Make sure that the change passes the CI checks.

[elangelo]

Thanks for the PR. Would it be possible to use the key pulsar_metadata.nodeSelector instead of initialize_jobs.nodeSelector? Please also add a placeholder in the default values.yaml with a comment documenting the setting. The value should be empty.

what do i do for the bookkeeper_cluster_initalize jobs? specify another nodeSelector value? or use the pulsar_metadata.nodeSelector value there as well?

[lhotari]

what do i do for the bookkeeper_cluster_initalize jobs? specify another nodeSelector value? or use the pulsar_metadata.nodeSelector value there as well?

I think it's fine to use the pulsar_metadata.nodeSelector value there as well.

[michaeljmarshall]

Thanks for your contribution @elangelo!