[bazel] Modify includes for piserver

[c8ef]

BMv2 has following use case:

https://github.com/p4lang/behavioral-model/blob/044fccf9d40b04849f9f0d9b314f63678738ec25/targets/simple_switch_grpc/switch_runner.cpp#L31

We need this patch to expose the piserver's header files so that BMv2 can successfully build with Bazel without missing header/include errors.

[c8ef]

cc @fruffy @jafingerhut @matthewtlam for review.

[c8ef]

Also, from this bazel build run, we can see that the build cache is working well. The bazel action finished almost instantly.

[c8ef]

Gentle ping on this PR since it's a required dependency for the bmv2 bazel build~

[jafingerhut]

Gentle ping on this PR since it's a required dependency for the bmv2 bazel build~

FYI, I could rubber-stamp approve it, without knowing what the changes mean, as I have no knowledge of how Bazel works, but it would be better if someone with at least some knowledge of Bazel can review it.

[fruffy]

Bazel changes should be reviewed by @p4lang/google-p4-infra folks.

[matthewtlam]

LGTM!

@c8ef Can we update the PR description regarding that we need this to expose the piserver's header files so that BMv2 can successfully build with Bazel without missing header/include errors?

[c8ef]

Can we update the PR description regarding that we need this to expose the piserver's header files so that BMv2 can successfully build with Bazel without missing header/include errors?

Done.