Support time slice slo

[keidarcy]

Describe the Feature

https://docs.datadoghq.com/service_management/service_level_objectives/time_slice/

Support time slice slo like monitor slo and metric slo

Expected Behavior

Create time slice slo using YAML

Use Case

Create time slice slo using YAML

Describe Ideal Solution

Add slice slo support

Alternatives Considered

No response

Additional Context

No response

[fabn]

+100 for this