[WAFD]: fix instance creation after API update

[artem-lifshits]

Summary of the Pull Request

API introduced new required parameter which broke the resource.

PR Checklist

• Refers to: dedicated waf creation failed. unexpected status 4. #2375
• Tests passed.
• Release notes added.

Acceptance Steps Performed

=== RUN   TestAccWafDedicatedInstanceV1_basic
2023/11/23 10:50:26 [DEBUG] The opentelekomcloud Waf dedicated instance test running in 'eu-de' region.
--- PASS: TestAccWafDedicatedInstanceV1_basic (391.20s)
PASS

Process finished with the exit code 0

[otc-zuul]

Build succeeded.
https://zuul.otc-service.com/t/eco/buildset/115ab2c829be41ada7d5e62bfc369476

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✔️ otc-golangci-lint SUCCESS in 2m 58s
✔️ golang-make-test SUCCESS in 4m 33s
✔️ golang-make-vet SUCCESS in 3m 53s
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