Add build number to container name per Artem's request.

Makefile

@@ -116,11 +116,11 @@ setup-for-sbercloud:
 .PHONY: pytest-docker
 pytest-docker:
 	-docker ps
-	-docker rm   neofs_tests_py
+	-docker rm neofs_tests_py$(BUILD_NUMBER)
 	-docker pull $(DEV_IMAGE_PY)
 	docker run -t --rm                                  \
 		-w /tests										\
-		--name neofs_tests_py							\
+		--name neofs_tests_py$(BUILD_NUMBER)			\
 		-e PYTHONPATH="/tests/neofs-keywords/lib:/tests/neofs-keywords/robot:/tests/robot/resources/lib:/tests/robot/resources/lib/python_keywords:/tests/robot/variables:/tests/pytest_tests/helpers"	\
 		-v $(CURDIR):/tests								\
 		-v /var/run/docker.sock:/var/run/docker.sock	\

pytest_tests/pytest.ini

@@ -10,6 +10,7 @@ markers =
     sanity: small tests subset
     staging: test to be excluded from run in verifier/pr-validation/sanity jobs and run test in staging job
 #   functional markers
+    container: tests for container creation
     grpc_api: standard gRPC API tests
     http_gate: HTTP gate contract
     s3_gate: S3 gate tests