update golang.org/x/tools@v0.39.0

[KoheiMatsuno99]

Changes

• 🧹 Update golang.org/x/tools from v0.24.0 to v0.39.0
• 🧹 Update Go version requirement from 1.20 to 1.24.0
• 🐛 Fix build failures occurring with v0.24.0

/kind bug

golang/go#74462

Context

The existing dependency golang.org/x/tools@v0.24.0 was causing build failures. This PR updates to v0.39.0 to resolve
compatibility issues and add support for Go 1.24.

Changes Details

• golang.org/x/tools: v0.24.0 → v0.39.0
• golang.org/x/mod: v0.20.0 → v0.30.0 (indirect)
• golang.org/x/sync: v0.8.0 → v0.18.0 (indirect)
• Go version: 1.20 → 1.24.0

Testing

• ✅ make build - Binary builds successfully
• ✅ make test - All tests pass

Release Note

Updated golang.org/x/tools to v0.39.0 to fix build failures. **Action required**: Minimum Go version is now 1.24.0.

Docs

N/A - Dependency update only, no documentation changes required.