feat(vpcep): the VPC endpoint service resource supports tcp_proxy field

[ruwenqiang123]

What this PR does / why we need it:

The VPC endpoint service resource supports tcp_proxy field.

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

• [x] Tests added/passed.

$ make testacc TEST="./huaweicloud/services/acceptance/vpcep" TESTARGS="-run TestAccVPCEPService_Basic"
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./huaweicloud/services/acceptance/vpcep -v -run TestAccVPCEPService_Basic -timeout 360m -parallel 4
=== RUN   TestAccVPCEPService_Basic
=== PAUSE TestAccVPCEPService_Basic
=== CONT  TestAccVPCEPService_Basic
--- PASS: TestAccVPCEPService_Basic (276.84s)
PASS
ok      github.com/huaweicloud/terraform-provider-huaweicloud/huaweicloud/services/acceptance/vpcep     276.906s

• [x] Documentation updated.
• [x] 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 <<<<<<

[dengyali0125]

LGTM

[deer-hang]

/approve

[deer-hang]

/lgtm