Stabilize new attribute value types

Stabilize the new attribute values added in:
- https://github.com/open-telemetry/opentelemetry-specification/pull/4651

Following issues should be addressed before that:
- https://github.com/open-telemetry/opentelemetry-specification/issues/4707
- https://github.com/open-telemetry/opentelemetry-specification/issues/4708
- https://github.com/open-telemetry/opentelemetry-specification/issues/4709