[Fix] CCE: Fix CCE nodes kubernetes tags issue

[muneeb-jan]

Summary of the Pull Request

APIs returning extra k8s tags "node.cce.io/billing-mode" and "node.cce.io/eni-network-mode" which leads to plan differences. We remove these two before returning state.

PR Checklist

• Tests added/passed.
• Release notes added.

Acceptance Steps Performed

=== RUN   TestAccResourceCCENodesV3TaintsK8sTags
    resource_opentelekomcloud_cce_node_v3_test.go:440: Cluster is required by the test. 1 test(s) are using cluster.
    cluster.go:121: starting creating shared cluster
=== PAUSE TestAccResourceCCENodesV3TaintsK8sTags
=== CONT  TestAccResourceCCENodesV3TaintsK8sTags
    cluster.go:117: Cluster usage is 0 now, ready to delete the cluster
    cluster.go:80: starting deleting shared cluster
--- PASS: TestAccResourceCCENodesV3TaintsK8sTags (665.46s)
PASS

[otc-zuul]

Build succeeded.
https://zuul.otc-service.com/t/eco/buildset/35fde85c891d447890781f27c8e510b7

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