Increase lifespan of test-times files

- build_environment is hard coded to value from upstream when
  branch for created, since the dev/QA ENV build_environment
  value can be varing

Author: pruthvistony

test/run_test.py

@@ -1427,7 +1427,8 @@ def load_test_times_from_file(
 
     with open(path) as f:
         test_times_file = cast(Dict[str, Any], json.load(f))
-    build_environment = os.environ.get("BUILD_ENVIRONMENT")
+    # build_environment hard coded to value from upstream when branch is created
+    build_environment = "linux-focal-rocm6.0-py3.8"
     test_config = os.environ.get("TEST_CONFIG")
     if test_config in test_times_file.get(build_environment, {}):
         print_to_stderr("Found test times from artifacts")

tools/stats/import_test_stats.py

@@ -29,7 +29,8 @@ def get_disabled_issues() -> List[str]:
 TD_HEURISTIC_HISTORICAL_EDITED_FILES = "td_heuristic_historical_edited_files.json"
 TD_HEURISTIC_PREVIOUSLY_FAILED = "previous_failures.json"
 
-FILE_CACHE_LIFESPAN_SECONDS = datetime.timedelta(hours=3).seconds
+#increse the cache time to 6 months
+FILE_CACHE_LIFESPAN_SECONDS = 6 * 30 * 24 * 3600
 
 
 def fetch_and_cache(