feat(ces): add data source to get the list of CES one-click alarms

[profoundwu]

What this PR does / why we need it: add data source to get the list of CES one-click alarms 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:

1. add data source to get the list of CES one-click alarms

PR Checklist

• [x] Tests added/passed.

 make testacc TEST="./huaweicloud/services/acceptance/ces" TESTARGS="-run TestAccDataSourceCesOneClickAlarms_basic"
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./huaweicloud/services/acceptance/ces -v -run TestAccDataSourceCesOneClickAlarms_basic -timeout 360m -parallel 4
=== RUN   TestAccDataSourceCesOneClickAlarms_basic
=== PAUSE TestAccDataSourceCesOneClickAlarms_basic
=== CONT  TestAccDataSourceCesOneClickAlarms_basic
--- PASS: TestAccDataSourceCesOneClickAlarms_basic (11.81s)
PASS
ok      github.com/huaweicloud/terraform-provider-huaweicloud/huaweicloud/services/acceptance/ces       11.874s

• [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 <<<<<<

[houpeng80]

/lgtm

[Jason-Zhang9309]

/approve