Support grpc configuration of opentelemetry provider

[Kuromesi]

Description

Add documents to introduce how to configure gRPC headers and timeout when export traces to OpenTelemetry for this feature request istio/istio#52873.

Reviewers

• Ambient
• Docs
• Installation
• Networking
• Performance and Scalability
• Extensions and Telemetry
• Security
• Test and Release
• User Experience
• Developer Infrastructure
• Localization/Translation

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[istio-testing]

Hi @Kuromesi. Thanks for your PR.

I'm waiting for a istio member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[Arhell]

/ok-to-test

[zirain]

only available on master, don't cherrypick.