optimize parms for ingest bench (#9999)

## Problem

we tried different parallelism settings for ingest bench 

## Summary of changes

the following settings seem optimal after merging
- SK side Wal filtering
- batched getpages

Settings:
- effective_io_concurrency 100
- concurrency limit 200 (different from Prod!)
- jobs 4, maintenance workers 7
- 10 GB chunk size

.github/workflows/ingest_benchmark.yml

@@ -26,6 +26,7 @@ concurrency:
 jobs:
   ingest:
     strategy:
+      fail-fast: false # allow other variants to continue even if one fails
       matrix:
         target_project: [new_empty_project, large_existing_project]  
     permissions:

test_runner/performance/test_perf_ingest_using_pgcopydb.py

@@ -60,13 +60,13 @@ def build_pgcopydb_command(pgcopydb_filter_file: Path, test_output_dir: Path):
         "--no-acl",
         "--skip-db-properties",
         "--table-jobs",
-        "8",
+        "4",
         "--index-jobs",
-        "8",
+        "4",
         "--restore-jobs",
-        "8",
+        "4",
         "--split-tables-larger-than",
-        "5GB",
+        "10GB",
         "--skip-extensions",
         "--use-copy-binary",
         "--filters",
@@ -136,7 +136,7 @@ def run_command_and_log_output(command, log_file_path: Path):
         "LD_LIBRARY_PATH": f"{os.getenv('PGCOPYDB_LIB_PATH')}:{os.getenv('PG_16_LIB_PATH')}",
         "PGCOPYDB_SOURCE_PGURI": cast(str, os.getenv("BENCHMARK_INGEST_SOURCE_CONNSTR")),
         "PGCOPYDB_TARGET_PGURI": cast(str, os.getenv("BENCHMARK_INGEST_TARGET_CONNSTR")),
-        "PGOPTIONS": "-c maintenance_work_mem=8388608 -c max_parallel_maintenance_workers=16",
+        "PGOPTIONS": "-c maintenance_work_mem=8388608 -c max_parallel_maintenance_workers=7",
     }
     # Combine the current environment with custom variables
     env = os.environ.copy()