Remove `from . import` from benchmarking scripts. (#27977)

tools/run_tests/performance/bq_upload_result.py

@@ -25,7 +25,8 @@ import sys
 import time
 import uuid
 
-from . import massage_qps_stats
+sys.path.append(os.path.dirname(os.path.abspath(__file__)))
+import massage_qps_stats
 
 gcp_utils_dir = os.path.abspath(
     os.path.join(os.path.dirname(__file__), '../../gcp/utils'))

tools/run_tests/performance/loadtest_config.py

@@ -31,12 +31,12 @@ import os
 import string
 import sys
 from typing import Any, Dict, Iterable, Mapping, Optional, Type
-import uuid
 
 import yaml
 
-from . import scenario_config
-from . import scenario_config_exporter
+sys.path.append(os.path.dirname(os.path.abspath(__file__)))
+import scenario_config
+import scenario_config_exporter
 
 CONFIGURATION_FILE_HEADER_COMMENT = """
 # Load test configurations generated from a template by loadtest_config.py.

tools/run_tests/performance/loadtest_template.py

@@ -31,7 +31,8 @@ from typing import Any, Dict, Iterable, List, Mapping, Type
 
 import yaml
 
-from . import loadtest_config
+sys.path.append(os.path.dirname(os.path.abspath(__file__)))
+import loadtest_config
 
 TEMPLATE_FILE_HEADER_COMMENT = """
 # Template generated from load test configurations by loadtest_template.py.

tools/run_tests/performance/massage_qps_stats.py

@@ -14,7 +14,10 @@
 
 # Autogenerated by tools/codegen/core/gen_stats_data.py
 
-from . import massage_qps_stats_helpers
+import sys
+
+sys.path.append(os.path.dirname(os.path.abspath(__file__)))
+import massage_qps_stats_helpers
 
 
 def massage_qps_stats(scenario_result):