Support pod affinity rule configuration for web pods

[ismaildem]

Is your feature request related to a problem? Please describe.
The Pulp Operator allows configuring affinity rules for the api, worker, and content components, but not for the web pod. This makes it impossible to control pod placement for web pods in the same way as the other components, which can be an issue in highly available or production environments.

Describe the solution you'd like
Expose affinity rule configuration for the web pod, consistent with the existing support for api, worker, and content.

Additional context
The difference in supported fields can be seen in the CRD definition:
https://github.com/pulp/pulp-operator/blob/main/config/crd/bases/repo-manager.pulpproject.org_pulps.yaml