abitest: re-enable server streaming tests (#1150)

PR submission overlap between #1105 and #1117

examples/abitest/example.toml

@@ -6,7 +6,7 @@ module_1 = { Cargo = { cargo_manifest = "examples/abitest/module_1/rust/Cargo.to
 
 [clients]
 cpp = { Bazel = { bazel_target = "//examples/abitest/client:client" }, additional_args = [
-  "--test_exclude=(Storage|GrpcServerServerStreamingMethod)",
+  "--test_exclude=Storage",
   "--cert_chain=../../../../../../../../examples/certs/local/local.pem",
   "--private_key=../../../../../../../../examples/certs/local/local.key",
 ] }