Unified: use link_deps for native deps of swift_syntax_rs

[redsun82]

rules_rust now warns on every build that C++ libraries in deps are deprecated and will stop working:

WARNING: Target @@ql+//unified/swift-syntax-rs:static_runtime_group_start in 'deps' of
@@ql+//unified/swift-syntax-rs:swift_syntax_rs is a C++ library. Only Rust targets are
allowed in 'deps'. Please use 'link_deps' for manual FFI linkage.

All entries in that select are CcInfo-only targets (the two linker-group cc_library shims and the swift_library FFI shim), so they move wholesale to link_deps. rules_rust appends link_deps after deps and preserves list order, so the --start-group / --end-group sequencing is unaffected.

Verified bazel aquery link arguments for swift-syntax-parse are byte-identical before and after, under both the default and the static_swift_runtime platform.

[Copilot]

Copilot review overview

🟢 Approval recommended

The targeted migration matches rules_rust semantics and preserves existing linkage behavior.

Review tier: Balanced
Findings: None

What changed in this PR

Moves Swift native FFI dependencies to the supported rules_rust attribute while preserving linker ordering.

Changes:

• Replaces deps with link_deps for native Swift/C++ dependencies.
• Eliminates the rules_rust deprecation warning.

File	Description
unified/​swift-syntax-rs/​BUILD.bazel	Uses link_deps for native dependencies.

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[asgerf]

Thanks!