Add loader and sceanrio runner interfaces, add support for local scenario

Signed-off-by: Andrey Berezin <a.berezin@yadro.com>

src/frostfs_testlib/load/interfaces.py

@@ -0,0 +1,53 @@
+from abc import ABC, abstractmethod
+
+from frostfs_testlib.load.load_config import LoadParams
+from frostfs_testlib.shell.interfaces import Shell
+from frostfs_testlib.storage.cluster import ClusterNode
+from frostfs_testlib.storage.dataclasses.wallet import WalletInfo
+
+
+class Loader(ABC):
+    @abstractmethod
+    def get_shell(self) -> Shell:
+        """Get shell for the loader"""
+
+    @property
+    @abstractmethod
+    def ip(self):
+        """Get address of the loader"""
+
+
+class ScenarioRunner(ABC):
+    @abstractmethod
+    def prepare(
+        self,
+        load_params: LoadParams,
+        nodes_under_load: list[ClusterNode],
+        k6_dir: str,
+    ):
+        """Preparation steps before running the load"""
+
+    @abstractmethod
+    def init_k6_instances(self, load_params: LoadParams, endpoints: list[str], k6_dir: str):
+        """Init K6 instances"""
+
+    @abstractmethod
+    def start(self):
+        """Start K6 instances"""
+
+    @abstractmethod
+    def stop(self):
+        """Stop K6 instances"""
+
+    @property
+    @abstractmethod
+    def is_running(self) -> bool:
+        """Returns True if load is running at the moment"""
+
+    @abstractmethod
+    def wait_until_finish(self):
+        """Wait until load is finished"""
+
+    @abstractmethod
+    def get_results(self) -> dict:
+        """Get results from K6 run"""