Summary: Now that the repos are public we can refer to them using bazel directly instead of private submodules.

Test Plan: existing

Reviewers: michelle, vihang, oazizi, #third_party_approvers

Reviewed By: vihang, #third_party_approvers

Differential Revision: https://phab.corp.pixielabs.ai/D8281

GitOrigin-RevId: a0cb8635b8b87dcdf7c2fc4e4f8ef00dbad2ff91