Replace flake8 and isort with ruff (#3810)

- Introduce ruff (https://beta.ruff.rs/) to replace flake8 and isort
- Update mypy and black

scripts/export_import_between_pageservers.py

@@ -308,8 +308,8 @@ def lsn_to_hex(num: int) -> str:
 
 def lsn_from_hex(lsn_hex: str) -> int:
     """Convert lsn from hex notation to int."""
-    l, r = lsn_hex.split("/")
-    return (int(l, 16) << 32) + int(r, 16)
+    left, right = lsn_hex.split("/")
+    return (int(left, 16) << 32) + int(right, 16)
 
 
 def remote_consistent_lsn(
@@ -398,7 +398,6 @@ def reconstruct_paths(log_dir, pg_bin, base_tar, port: int):
                 result = vanilla_pg.safe_psql(query, user="cloud_admin", dbname=database)
                 for relname, filepath in result:
                     if filepath is not None:
-
                         if database == "template0copy":
                             # Add all template0copy paths to template0
                             prefix = f"base/{oid}/"

scripts/reformat

@@ -6,6 +6,5 @@ set -euox pipefail
 echo 'Reformatting Rust code'
 cargo fmt
 echo 'Reformatting Python code'
-poetry run isort test_runner scripts
-poetry run flake8 test_runner scripts
+poetry run ruff --fix test_runner scripts
 poetry run black test_runner scripts

scripts/sk_cleanup_tenants/script.py

@@ -68,7 +68,6 @@ def call_delete_tenant_api(tenant_id):
 
 
 def cleanup_tenant(tenant_id):
-
     tenant_dir = Path(f"/storage/safekeeper/data/{tenant_id}")
 
     if not tenant_dir.exists():