Merge pull request #10115 from thunderboltsid/update-run-tests-scripts-to-python3.x

tools/run_tests/artifacts/artifact_targets.py

tools/run_tests/artifacts/distribtest_targets.py

tools/run_tests/artifacts/package_targets.py

tools/run_tests/performance/bq_upload_result.py

tools/run_tests/python_utils/antagonist.py

tools/run_tests/python_utils/filter_pull_request_tests.py

tools/run_tests/python_utils/port_server.py

tools/run_tests/python_utils/report_utils.py

tools/run_tests/run_build_statistics.py

tools/run_tests/run_interop_tests.py

tools/run_tests/run_microbenchmark.py

tools/run_tests/run_performance_tests.py

tools/run_tests/run_stress_tests.py

tools/run_tests/run_tests.py

tools/run_tests/run_tests_matrix.py

tools/run_tests/sanity/check_sources_and_headers.py

tools/run_tests/sanity/check_test_filtering.py

tools/run_tests/sanity/check_version.py

tools/run_tests/sanity/core_banned_functions.py

tools/run_tests/start_port_server.py