[FEATURE]: Async OpenFeature provider support #15826
Description
Package Name
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Package Version(s)
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Describe the goal of the feature
The OpenFeature Python SDK allows providers to offer async versions of the core get_xxx_value methods, which makes it compatible with Python programs that run in asyncio (https://openfeature.dev/docs/reference/sdks/server/python/#asynchronous-feature-retrieval). Right now, the provider inside ddtrace doesn't support it, which is preventing us from migrating to Datadog's feature flag feature.
Is your feature request related to a problem?
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Describe alternatives you've considered
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Additional context
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