Add tools/cmake to unittests

[jathu]

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

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/10752

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❌ 2 New Failures, 1 Cancelled Job

As of commit 939e4f6 with merge base c837925 ():

NEW FAILURES - The following jobs have failed:

• .github/workflows/build-presets.yml (gh)
• pull / unittest-editable / linux / linux-job (gh)
  RuntimeError: Command docker exec -t 564a929c08272431c91ac58cabb3b7d2930c8805788d61ace80688fc484deae5 /exec failed with exit code 1

CANCELLED JOB - The following job was cancelled. Please retry:

• Check Labels (gh)

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