feat(dws): supports updating eip_id for the cluster

[wuzhuanhong]

What this PR does / why we need it:

1. The cluster resource supports updating the EIP ID.
2. Adjust the corresponding acceptance tests.
3. Remove the Computed of the tags parameter.

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:

PR Checklist

• Tests added/passed.

./scripts/acc-test.sh
>>> Start to test
=== RUN   TestAccResourceCluster_basicV1
=== PAUSE TestAccResourceCluster_basicV1
=== RUN   TestAccResourceCluster_basicV2
=== PAUSE TestAccResourceCluster_basicV2
=== RUN   TestAccResourceCluster_basicV2_mutilAZs
=== PAUSE TestAccResourceCluster_basicV2_mutilAZs
=== CONT  TestAccResourceCluster_basicV1
=== CONT  TestAccResourceCluster_basicV2_mutilAZs
=== CONT  TestAccResourceCluster_basicV2
=== CONT  TestAccResourceCluster_basicV2_mutilAZs
    acceptance.go:1928: HW_DWS_MUTIL_AZS must be set for the acceptance test
--- SKIP: TestAccResourceCluster_basicV2_mutilAZs (0.00s)
--- PASS: TestAccResourceCluster_basicV1 (2577.02s)
--- PASS: TestAccResourceCluster_basicV2 (3195.93s)
PASS
coverage: 18.9% of statements in ../../dws
ok      github.com/huaweicloud/terraform-provider-huaweicloud/huaweicloud/services/acceptance/dws       3196.003s

• 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 <<<<<<

[wuzhuanhong]

make testacc TEST=./huaweicloud/services/acceptance/dws TESTARGS='-run TestAccResourceCluster_'
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./huaweicloud/services/acceptance/dws -v -run TestAccResourceCluster_ -timeout 360m -parallel 4
=== RUN TestAccResourceCluster_basicV1
=== PAUSE TestAccResourceCluster_basicV1
=== RUN TestAccResourceCluster_basicV2
=== PAUSE TestAccResourceCluster_basicV2
=== RUN TestAccResourceCluster_basicV2_mutilAZs
=== PAUSE TestAccResourceCluster_basicV2_mutilAZs
=== CONT TestAccResourceCluster_basicV1
=== CONT TestAccResourceCluster_basicV2_mutilAZs
=== CONT TestAccResourceCluster_basicV2
--- PASS: TestAccResourceCluster_basicV2_mutilAZs (1486.74s)
--- PASS: TestAccResourceCluster_basicV1 (2772.40s)
--- PASS: TestAccResourceCluster_basicV2 (3430.20s)
PASS
ok github.com/huaweicloud/terraform-provider-huaweicloud/huaweicloud/services/acceptance/dws 3430.259s

[Lance52259]

/approve
/lgtm

[github-ci-robot]

This PR has been approved by: @Lance52259

/approve
/lgtm