fix(tvix/castore/GRPCDirectorySvc): fix a bug in the get_recursive fn r/8412

When retrieving a closure with get_recursive, the following could happen in the GRPC client:
- The first reference to the deduplicated directory is added to expected_directory_digests
- The deduplicated directory is obtained removed from expected_directory_digests
- The second reference to the deduplicated directory is added to expected_directory_digests
- The deduplicated directory has already been sent, but is still in the
  expected_directory_digests. It looks to the GRPC client like the
  closure is incomplete and the stream ended prematurely.

Change-Id: Ic62bca12e7f8fb85af5fa4dacd199f0f3b8eea8c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12033
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>

0 files changed, 0 insertions, 0 deletions