[bazel] Upgrade rules_go to its latest version (v0.29 to v0.30).
[bazel] Upgrade rules_go to its latest version (v0.29 to v0.30).

Bug: skia:13063
Change-Id: I9014790d993b394fbfaf4f7195f980821b6c7c04
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/521276
Reviewed-by: Kevin Lubick <7cdab2cfab351f23814786ba39716e90eed69047@google.com>
Commit-Queue: Leandro Lovisolo <f558143c2568be8d55575d13f30a1fc5cb8009d5@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot