Delete tenant's data from s3 (#4855)

## Summary of changes

For context see
https://github.com/neondatabase/neon/blob/main/docs/rfcs/022-pageserver-delete-from-s3.md

Create Flow to delete tenant's data from pageserver. The approach
heavily mimics previously implemented timeline deletion implemented
mostly in https://github.com/neondatabase/neon/pull/4384 and followed up
in https://github.com/neondatabase/neon/pull/4552

For remaining deletion related issues consult with deletion project
here: https://github.com/orgs/neondatabase/projects/33

resolves #4250
resolves https://github.com/neondatabase/neon/issues/3889

---------

Co-authored-by: Joonas Koivunen <joonas@neon.tech>

test_runner/fixtures/utils.py

@@ -6,13 +6,16 @@ import subprocess
 import tarfile
 import time
 from pathlib import Path
-from typing import Any, Callable, Dict, List, Tuple, TypeVar
+from typing import TYPE_CHECKING, Any, Callable, Dict, List, Tuple, TypeVar
 from urllib.parse import urlencode
 
 import allure
 from psycopg2.extensions import cursor
 
 from fixtures.log_helper import log
+
+if TYPE_CHECKING:
+    from fixtures.neon_fixtures import PgBin
 from fixtures.types import TimelineId
 
 Fn = TypeVar("Fn", bound=Callable[..., Any])
@@ -314,3 +317,15 @@ def wait_while(number_of_iterations: int, interval: float, func):
         except Exception:
             return
     raise Exception("timed out while waiting for %s" % func)
+
+
+def run_pg_bench_small(pg_bin: "PgBin", connstr: str):
+    """
+    Fast way to populate data.
+    For more layers consider combining with these tenant settings:
+    {
+        "checkpoint_distance": 1024 ** 2,
+        "image_creation_threshold": 100,
+    }
+    """
+    pg_bin.run(["pgbench", "-i", "-I dtGvp", "-s1", connstr])