Adding namespace_selector field. initial state

[JaylonmcShan03]

Description

Resolves #2532
This pr adds the namespace_selector field to to enhance pod affinity and anti-affinity rules, allowing selection of namespaces based on label selectors.

We are currently leveraging metav1.LabelSelector as a temporary solution for handling namespace selection due to the absence of a dedicated NamespaceSelector type in the metav1 package.

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Acceptance tests

• Have you added an acceptance test for the functionality being added?
• Have you run the acceptance tests on this branch?

Output from acceptance testing:

$ make testacc TESTARGS='-run=TestAccXXX'

=== RUN   TestAccKubernetesPodV1_with_pod_affinity_with_required_during_scheduling_ignored_during_execution
=== PAUSE TestAccKubernetesPodV1_with_pod_affinity_with_required_during_scheduling_ignored_during_execution
=== CONT  TestAccKubernetesPodV1_with_pod_affinity_with_required_during_scheduling_ignored_during_execution
--- PASS: TestAccKubernetesPodV1_with_pod_affinity_with_required_during_scheduling_ignored_during_execution 
PASS
ok      github.com/hashicorp/terraform-provider-kubernetes/kubernetes   12.452s


=== RUN   TestAccKubernetesPodV1_with_pod_affinity_with_preferred_during_scheduling_ignored_during_execution
=== PAUSE TestAccKubernetesPodV1_with_pod_affinity_with_preferred_during_scheduling_ignored_during_execution
=== CONT  TestAccKubernetesPodV1_with_pod_affinity_with_preferred_during_scheduling_ignored_during_execution
--- PASS: TestAccKubernetesPodV1_with_pod_affinity_with_preferred_during_scheduling_ignored_during_execution 
PASS
ok      github.com/hashicorp/terraform-provider-kubernetes/kubernetes   12.208s

Release Note

Release note for CHANGELOG:

Added support for `namespace_selector` field in `PodAffinityTerm` to enhance pod affinity and anti-affinity rules, allowing selection of namespaces based on label selectors. (#2577)

References

Community Note

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[BBBmau]

Be sure to add a changelog entry!

[BBBmau]

Nice work! 🎉