[Fix] No test result report while not using ctest (#15976)

### Description
1. Set gtest output while ctest is set to empty.
2. onnx_src in _deps shouldn't be removed because
onnx_test_pytorch_converted and onnx_test_pytorch_converted need to read
data from onnx/backend/test/data/..

### Motivation and Context
Test result report is important to find the flaky tests.

### To do
Tests are not inconsistent.
If ctest_path is empty, onnx_test_pytorch_converted and
onnx_test_pytorch_converted will not be executed, if it's not,
onnxruntime_mlas_test will not be executed.


270c09a37f/tools/ci_build/build.py (L1743-L1753)

tools/ci_build/build.py

@@ -1748,8 +1748,8 @@ def run_onnxruntime_tests(args, source_dir, ctest_path, build_dir, configs):
                 executables.append("onnxruntime_api_tests_without_env")
                 executables.append("onnxruntime_customopregistration_test")
             for exe in executables:
-                run_subprocess([os.path.join(cwd, exe)], cwd=cwd, dll_path=dll_path)
-
+                test_output = f"--gtest_output=xml:{cwd}/{exe}.{config}.results.xml"
+                run_subprocess([os.path.join(cwd, exe), test_output], cwd=cwd, dll_path=dll_path)
         else:
             ctest_cmd = [ctest_path, "--build-config", config, "--verbose", "--timeout", args.test_all_timeout]
             run_subprocess(ctest_cmd, cwd=cwd, dll_path=dll_path)

tools/ci_build/github/azure-pipelines/linux-gpu-ci-pipeline.yml

@@ -88,9 +88,9 @@ jobs:
   - task: CmdLine@2
     inputs:
       script: |
-        rm -rf $(Build.BinariesDirectory)/Release/onnxruntime $(Build.BinariesDirectory)/Release/pybind11 $(Build.BinariesDirectory)/Release/_deps
+        rm -rf $(Build.BinariesDirectory)/Release/onnxruntime $(Build.BinariesDirectory)/Release/pybind11
         rm -f $(Build.BinariesDirectory)/Release/models
-        rm -rf $(Build.BinariesDirectory)/Release/_deps
+        find $(Build.BinariesDirectory)/Release/_deps -mindepth 1 ! -regex '^$(Build.BinariesDirectory)/Release/_deps/onnx-src\(/.*\)?' -delete
         cd $(Build.BinariesDirectory)/Release
         find -executable -type f > $(Build.BinariesDirectory)/Release/perms.txt