go: bump the go group across 1 directory with 2 updates

[dependabot]

Bumps the go group with 2 updates in the / directory: golang.org/x/tools and google.golang.org/protobuf.

Updates golang.org/x/tools from 0.50.0 to 0.51.0

Commits

• ea2f152 go.mod: update golang.org/x dependencies
• 00443da go/analysis/passes/printf: pin testdata Go versions
• 9ba0a15 internal/refactor/inline: check import accessibility before Go version
• 25196fc cmd/toolstash: check -linkobj files to support early export
• ead0503 gopls/internal/golang: unexport dragon*Question variables
• 5693030 gopls/internal/golang: call arguments mistreated in inlineAllCalls
• 134264d gopls/internal/golang/stubmethods: do not panic when FindByPos fails
• 01d93d7 gopls/internal/golang: slay the dragon: update questions
• 405de39 go/callgraph: fix benchmarks to analyze whole program
• 231a7fa go/ssa, cmd/deadcode: release type information once functions are built
• Additional commits viewable in compare view

Updates google.golang.org/protobuf from 1.36.11 to 1.36.12

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