This pull request introduces mocking infrastructure to improve unit testing for the Kubernetes version provider. The main changes include adding GoMock-generated mocks for key Kubernetes client interfaces, introducing new unit tests that leverage these mocks, and updating dependencies and developer tooling to support mocking.

Testing infrastructure improvements

• Added GoMock-generated mock for DiscoveryInterface in pkg/mocks/discovery_mock.go, enabling simulation of Kubernetes discovery behavior in tests.
• Added new unit tests for the Kubernetes version provider in pkg/providers/kubernetesversion/kubernetesversion_test.go, covering various scenarios and making use of the new mocks.

Dependency and tooling updates

• Added go.uber.org/mock as an indirect dependency in go.mod to support GoMock-based mocking.
• Added a new mocks task in taskfile.yaml to automate generation of mock files for Interface and DiscoveryInterface using mockgen.