feat(lts): add new resource supports kafka instance register to LTS

[wuzhuanhong]

What this PR does / why we need it:
Add new resource supports kafka instance register to LTS.

Which issue this PR fixes:
(optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged)
fixes #xxx

Special notes for your reviewer:

Release note:

Add new resource supports kafka instance register to LTS. This is a one-time action resource.

PR Checklist

• Tests added/passed.

 ./scripts/coverage.sh -o lts -f TestAccRegistKafkaInstance_
Prepare to calculate the coverage the following command:
TF_ACC=1 go test "./huaweicloud/services/acceptance/lts" -v -coverprofile="./huaweicloud/services/acceptance/lts/lts_coverage.cov" -coverpkg="./huaweicloud/services/lts" -run TestAccRegistKafkaInstance_ -timeout 360m -parallel 10
=== RUN   TestAccRegistKafkaInstance_basic
=== PAUSE TestAccRegistKafkaInstance_basic
=== RUN   TestAccRegistKafkaInstance_notSSL
=== PAUSE TestAccRegistKafkaInstance_notSSL
=== CONT  TestAccRegistKafkaInstance_basic
=== CONT  TestAccRegistKafkaInstance_notSSL
--- PASS: TestAccRegistKafkaInstance_notSSL (116.33s)
--- PASS: TestAccRegistKafkaInstance_basic (119.40s)
PASS
coverage: 11.0% of statements in ./huaweicloud/services/lts
ok      github.com/huaweicloud/terraform-provider-huaweicloud/huaweicloud/services/acceptance/lts       119.485s        coverage: 11.0% of statements in ./huaweicloud/services/lts

• Documentation updated.

• Schema updated.

• CheckDeleted.

  • a. During query operation (Read Context)
    aa. Resource not found
    >>>>>> Paste the screenshot here <<<<<<

  • b. During delete/disassociate/unbind operation (Delete Context)
    ba. Resource not found
    >>>>>> Paste the screenshot here <<<<<<

[Lance52259]

Suggested change

	var nonUpdatableParams = []string{"instance_id", "kafka_name", "connect_info", "connect_info.*.user_name", "connect_info.*.pwd"}
	var registerKafkaNonUpdatableParams = []string{"instance_id", "kafka_name", "connect_info", "connect_info.*.user_name", "connect_info.*.pwd"}

Avoid this vairable name conflict with others.

[Lance52259]

/approve
/lgtm

[github-ci-robot]

This PR has been approved by: @Lance52259

/approve
/lgtm