[fix](arrowflight) Advertise TLS result endpoints

[Yukang-Lian]

What problem does this PR solve?

Issue Number: N/A

Related PR: None

Problem Summary: When unified TLS enables the Arrow Flight protocol, the Flight SQL server still advertises backend result endpoints with the grpc+tcp scheme. Clients follow that plaintext endpoint and fail to retrieve results from a TLS-enabled backend. Select the advertised grpc+tls scheme from the same enable_tls and tls_excluded_protocols settings that start the Arrow Flight TLS server.

Release note

Arrow Flight SQL now advertises TLS backend result endpoints when Arrow Flight TLS is enabled.

Check List (For Author)

• Test: Unit Test: ./run-fe-ut.sh --run org.apache.doris.service.arrowflight.DorisFlightSqlProducerTest (5 passed)
• Behavior changed: Yes. Backend result endpoints use grpc+tls when Arrow Flight TLS is active and remain grpc+tcp otherwise.
• Does this need documentation: No

[hello-stephen]

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1. What problem was fixed (it's best to include specific error reporting information). How it was fixed.
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