This will make it convenient for other Bazel projects to depend on p4c.

Without this, every Bazel project transitively depending on p4c has to specify a git_override for p4runtime, which is inconvenient and not compositional.

I created the same issue for p4runtime and p4-constraints:

• Add P4Runtime to the Bazel Central Registry (BCR) p4runtime#572
• Add p4-constraints to the Bazel Central Registry (BCR) #572 p4-constraints#179