feature request: fluent-bit support mTLS

[zjj2wry]

Is your feature request related to a problem? Please describe.

We have a central Loki cluster and use fluent-bit send logs to the Loki cluster, so we need to do TLS client auth, basic auth is not enough

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[stale]

This issue has been automatically marked as stale because it has not had any activity in the past 30 days. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.