Update golang.org/x/tools to v0.34.0 for Go 1.25 compatibility

[stefanb]

The build error with Go 1.25 manifests as:

go1.25rc1 build ./...
# golang.org/x/tools/internal/tokeninternal
../../../go/pkg/mod/golang.org/x/tools@v0.21.1-0.20240508182429-e35e4ccd0d2d/internal/tokeninternal/tokeninternal.go:64:9: invalid array length -delta * delta (constant -256 of type int64)

updated via

go1.25rc1 get -u golang.org/x/tools
go: downloading golang.org/x/crypto v0.39.0
go: downloading golang.org/x/term v0.32.0
go: upgraded golang.org/x/crypto v0.36.0 => v0.39.0
go: upgraded golang.org/x/mod v0.17.0 => v0.25.0
go: upgraded golang.org/x/net v0.38.0 => v0.41.0
go: upgraded golang.org/x/sync v0.12.0 => v0.15.0
go: upgraded golang.org/x/sys v0.31.0 => v0.33.0
go: upgraded golang.org/x/text v0.23.0 => v0.26.0
go: upgraded golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d => v0.34.0

go1.25rc1 mod tidy

Related:

• Go proposal: go/token: add (*FileSet).AddExistingFiles method to add files out of order golang/go#73205
• Upstream golang.org/x/tools fix: https://go-review.googlesource.com/c/tools/+/675955 / golang/tools@2815c8b
• Problem found in go 1.25.0, go@1.24 1.24.6 (new formula) Homebrew/homebrew-core#226636

[kezhenxu94]

@stefanb thanks!

[stefanb]

Please don't forget to make a release sometime before or right after Go 1.25 release.