feat(ga): the accelerator resource ip_type field supports IPV6

[ruwenqiang123]

What this PR does / why we need it:

The accelerator resource ip_type field supports IPV6.

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.

$ make testacc TEST="./huaweicloud/services/acceptance/ga" TESTARGS="-run TestAccAccelerator_basic"
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./huaweicloud/services/acceptance/ga -v -run TestAccAccelerator_basic -timeout 360m -parallel 4
=== RUN   TestAccAccelerator_basic
=== PAUSE TestAccAccelerator_basic
=== CONT  TestAccAccelerator_basic
--- PASS: TestAccAccelerator_basic (96.32s)
PASS
ok      github.com/huaweicloud/terraform-provider-huaweicloud/huaweicloud/services/acceptance/ga        96.372s

• 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 <<<<<<

[jinyangyang222]

/lgtm

[ruwenqiang123]

$ make testacc TEST="./huaweicloud/services/acceptance/ga" TESTARGS="-run TestAccAccelerator_basic"
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./huaweicloud/services/acceptance/ga -v -run TestAccAccelerator_basic -timeout 360m -parallel 4
=== RUN   TestAccAccelerator_basic
=== PAUSE TestAccAccelerator_basic
=== CONT  TestAccAccelerator_basic
--- PASS: TestAccAccelerator_basic (96.35s)
PASS
ok      github.com/huaweicloud/terraform-provider-huaweicloud/huaweicloud/services/acceptance/ga        96.449s

[dengyali0125]

LGTM

[deer-hang]

/approve
/lgtm

[github-ci-robot]

This PR has been approved by: @deer-hang

/approve
/lgtm