Change all_namespaces type to set

[Fodoj]

Rollback Plan

If a change needs to be reverted, we will publish an updated version of the library.

Changes to Security Controls

No

Description

Namespace names are unique within Kubernetes cluster. Currently, to iterate over all namespaces using for_each one needs to wrap this data resource's attribute with toset() - this is unnessary, as it should be a set in the first palce.

Acceptance tests

• Have you run the acceptance tests on this branch?

Release Note

Release note for CHANGELOG:

Breaking: `data.kubernetes_all_namespaces.x.namespaces` is now of type Set, index-based references to it's elements need to be replaced.

Community Note

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