feat(bazel/browsers): update firefox and geckodriver to v97.0
feat(bazel/browsers): update firefox and geckodriver to v97.0

Updates Firefox and geckodriver to the latest stable version, with
the goal of reducing flakiness that is currently observable in
the Angular Material unit tests (where Firefox just randomly disconnects
and never recovers).

angular/dev-infra,angular/dev-infra,angular/dev-infra,angular/dev-infra