[Feat.] CCE: availability zone specification for opentelekomcloud_cce_cluster_v3

[artem-lifshits]

Summary of the Pull Request

Implemetation of availability zone setiing for CCE clusters.

PR Checklist

• Refers to: #xxx
• Tests added/passed.
• Documentation updated.
• Schema updated.
• Release notes added.

Acceptance Steps Performed

=== RUN   TestAccCCEClusterV3_basic
=== PAUSE TestAccCCEClusterV3_basic
=== CONT  TestAccCCEClusterV3_basic
--- PASS: TestAccCCEClusterV3_basic (506.70s)
PASS

Process finished with the exit code 0

[otc-zuul]

Build succeeded.
https://zuul.otc-service.com/t/eco/buildset/13db4b4d4b5444c1ae122b649f1243f7

✔️ build-otc-releasenotes SUCCESS in 4m 07s
✔️ noop SUCCESS in 0s
✔️ otc-golangci-lint SUCCESS in 3m 10s
✔️ golang-make-test SUCCESS in 3m 45s
✔️ golang-make-vet SUCCESS in 3m 04s
✔️ tflint SUCCESS in 1m 56s
✔️ goreleaser-build SUCCESS in 9m 08s