[Feat.] DMS: Add new resource opentelekomcloud_dms_consumer_group_v2

[muneeb-jan]

Summary of the Pull Request

Add new DMS resources:

• opentelekomcloud_dms_consumer_group_v2

PR Checklist

• [x] Refers to: #2729
• [x] Tests added/passed.
• [x] Documentation updated.
• [x] Schema updated.
• [x] Release notes added.

Acceptance Steps Performed

=== RUN   TestAccDmsConsumerGroupV2_basic
--- PASS: TestAccDmsConsumerGroupV2_basic (667.29s)
PASS

[otc-zuul[bot]]

Build succeeded. https://zuul.otc-service.com/t/eco/buildset/5c426938a8bb452fabbc2455d7d10959

:heavy_check_mark: build-otc-releasenotes SUCCESS in 4m 04s :heavy_check_mark: noop SUCCESS in 0s :heavy_check_mark: otc-golangci-lint SUCCESS in 3m 23s :heavy_check_mark: golang-make-test SUCCESS in 3m 43s :heavy_check_mark: golang-make-vet SUCCESS in 2m 37s :heavy_check_mark: tflint SUCCESS in 1m 49s :heavy_check_mark: goreleaser-build SUCCESS in 7m 24s