GH-46290: [Swift] Upgrade grpc-swift to 1.25.0 and swift-protobuf to 1.29.0

[dongjoon-hyun]

Rationale for this change

The current dependencies of ArrowFlight are outdated about two years. We had better update them to bring the latest features and bug fixes.

• grpc-swift

  • https://github.com/grpc/grpc-swift/releases/tag/1.15.0 (2023-04-11)
  • https://github.com/grpc/grpc-swift/releases/tag/1.25.0 (2025-04-28)

• swift-protobuf

  • https://github.com/apple/swift-protobuf/releases/tag/1.25.0 (2023-10-27)
  • https://github.com/apple/swift-protobuf/releases/tag/1.29.0 (2025-02-24)

What changes are included in this PR?

• Upgrade grpc-swift from 1.15.0 to 1.25.0.
• Upgrade swift-protobuf from 1.25.0 to 1.29.0.

Are these changes tested?

Yes.

Are there any user-facing changes?

No.

• GitHub Issue: [Swift] Upgrade grpc-swift to 1.25.0 and swift-protobuf to 1.29.0 #46290

[github-actions]

⚠️ GitHub issue #46290 has been automatically assigned in GitHub to PR creator.

[kou]

+1

[dongjoon-hyun]

Thank you, @kou .

[conbench-apache-arrow]

After merging your PR, Conbench analyzed the 4 benchmarking runs that have been run so far on merge-commit 6006f11.

There were 3 benchmark results indicating a performance regression:

• Commit Run on test-mac-arm at 2025-05-02 17:15:32Z
  • tpch (R) with engine=arrow, format=native, language=R, memory_map=False, query_id=TPCH-07, scale_factor=1
  • tpch (R) with engine=arrow, format=native, language=R, memory_map=False, query_id=TPCH-18, scale_factor=1
• and 1 more (see the report linked below)

The full Conbench report has more details.