Update dependency bazelbuild/buildtools to latest version
Update dependency bazelbuild/buildtools to latest version

Included changes:

  - f9b4c899957d552814b23abea2900a8fb4744c1d Print actual labels without ellipsis (#902)
  - b0c2bdbcc9e7dfb455a22f245967084c894839b6 Rename methods to avoid repetition (#908)
  - a4239584e0f3cdaf4fda5e4b94678552f05f8e8c Address readability comments (#907)

BAZEL_BUILDTOOLS_VERSION_REV_ID: f9b4c899957d552814b23abea2900a8fb4744c1d
Change-Id: I2d337848b979fc057a391907b2d8a046cae1763e

google/copybara,google/copybara,google/copybara