Add tools/cmake to unittests (#10752)

### Summary
TSIA

### Test plan

CI + check if `tools/cmake` tests are listed:

```
$ pytest --collect-only

...
  <Package tools>
    <Package cmake>
      <Package common>
        <Module preset_test.py>
          <UnitTestCase TestPreset>
            <TestCaseFunction test_create_workspace>
            <TestCaseFunction test_define_overridable_config_cli_override>
            <TestCaseFunction test_define_overridable_config_cli_override_with_set_override>
            <TestCaseFunction test_define_overridable_config_default>
            <TestCaseFunction test_define_overridable_config_invalid_name>
            <TestCaseFunction test_define_overridable_config_invalid_type>
            <TestCaseFunction test_define_overridable_config_set_override_after_with_cache>
            <TestCaseFunction test_define_overridable_config_set_override_before>
            <TestCaseFunction test_set_option>
            <TestCaseFunction testdefine_overridable_config_set_override_after>
...
```

cc @larryliu0820

Author: jathu

pytest.ini

@@ -54,6 +54,8 @@ addopts =
     extension/training/pybindings/test
     # Runtime
     runtime
+    # Tools
+    tools/cmake
     # test TODO: fix these tests
     # test/end2end/test_end2end.py
     --ignore=backends/xnnpack/test/ops/linear.py