devel/go-tools: update to 0.9.1
Selected upstream changes:
- bisect, cmd/bisect: add new library and tool
- internal/imports: sort fixes for deterministic results
- go/callgraph/vta: allow pointer to type parameter in sliceArrayElem
- go.mod: update golang.org/x dependencies
- bisect: diagnose bad targets better
- cmd/bisect: add -compile and -godebug shorthands
Changelog: https://github.com/golang/tools/compare/v0.8.0...v0.9.1