Cleanup GTests for simple_switch_grpc

[antoninbas]

https://github.com/p4lang/behavioral-model/tree/master/targets/simple_switch_grpc/tests

We currently create one switch instance which is used for all the tests. This is suboptimal as it means some state is preserved across tests (e.g. port operational status) and a failing test may cause other unrelated tests to fail as well.

[Anamika1608]

hey @fruffy @matthewtlam @antoninbas, can i work on this issue? i see there is no activity on this issue

[fruffy]

You can give this a try.

[p2peek]

The CI failure appears unrelated to this change.

The job fails during apt update with:

EXPKEYSIG A4666B6753C0F7D1 home:p4lang OBS Project

This suggests the P4 repository signing key has expired in the CI environment.

Once the repository key is refreshed, the tests should run normally.

[jafingerhut]

The CI failure appears unrelated to this change.

There are two different tests failing. The one you mentioned, yes you can ignore.

The other one fails for a very different reason, which I suspect you'll need to investigate why.