Feature/observable tags

[dylanholmes]

Changes:

• Small fixes after rebasing the release/cloud-unreleased branch.
• Add an optional list of tags to Observable.Call. This allows us to easily group spans.
• Add tags as a span attribute in OpenTelemetryObservabilityDriver
• Annotate prompt driver run with @observable(tags=["PromptDriver.run()"]).
• Annotate prompt driver try_run and try_stream with @observable. These spans will be useful for debugging exceptions that occur during retries.
• Annotate tool run @observable(tags=["Tool.run()"]).

Note: merging into release/cloud-unreleased rather than dev

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📚 Documentation preview 📚: https://griptape--954.org.readthedocs.build//954/