azure: Tracking issue: unpin Azure SDK

[mattsains]

Pre-filing checklist

• I searched existing issues and didn't find a duplicate

Component(s)

Rust OTAP dataflow (rust/otap-dataflow/)

Description

Once Arc support is included in a released version, unpin the Azure SDK used here: https://github.com/open-telemetry/otel-arrow/blob/main/rust/otap-dataflow/Cargo.toml#L232-L233

Additional Context

No response

[mattsains]

/assign me