[BaggagePropagator] handle baggage properties

[lachmatt]

Package

OpenTelemetry.Api

Package Version

Package Name	Version
OpenTelemetry.Api	1.8.0 (and previous versions)

Runtime Version

any

Description

When baggage item has additional metadata appended to it in a form of property set, such properties are treated as a part of a value.

Steps to Reproduce

Try to parse baggage header with content from example in specification, e.g key1=value1;property1;property2

Expected Result

value1 is extracted as a value of baggage entry. Properties attached to the value are recognized as a separate entities.

Actual Result

value1;property1;property2 is extracted as a value of baggage entry.

Additional Context

No response