fix: Use Alphabet 10k sample dataset.

[lee1premium]

Use Alphabet 10k sample dataset.

Fixes: b/333583659

Checklist

• [X] I have followed Sample Format Guide
• [ ] pom.xml parent set to latest shared-configuration
• [ ] Appropriate changes to README are included in PR
• [ ] These samples need a new API enabled in testing projects to pass (let us know which ones)
• [ ] These samples need a new/updated env vars in testing projects set to pass (let us know which ones)
• [X] Tests pass: mvn clean verify required
• [X] Lint passes: mvn -P lint checkstyle:check required
• [X] Static Analysis: mvn -P lint clean compile pmd:cpd-check spotbugs:check advisory only
• [ ] This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample
• [ ] This sample adds a new Product API, and I updated the Blunderbuss issue/PR auto-assigner with the codeowners for this sample
• [X] Please merge this PR for me once it is approved

[lee1premium]

Two unrelated errors are blocking this pull request:

• aiplatform.CreateCustomJobSampleTest
• aiplatform.CreateHyperparameterTuningJobSampleTest

---

[ERROR] aiplatform.CreateCustomJobSampleTest.testCreateCustomJobSample
[ERROR]   Run 1: CreateCustomJobSampleTest.testCreateCustomJobSample » InvalidArgument io.grpc....
[ERROR]   Run 2: CreateCustomJobSampleTest.tearDown:82 » NullPointer
[ERROR]   Run 3: CreateCustomJobSampleTest.testCreateCustomJobSample » InvalidArgument io.grpc....
[ERROR]   Run 4: CreateCustomJobSampleTest.tearDown:82 » NullPointer
[ERROR]   Run 5: CreateCustomJobSampleTest.testCreateCustomJobSample » InvalidArgument io.grpc....
[ERROR]   Run 6: CreateCustomJobSampleTest.tearDown:82 » NullPointer
[ERROR]   Run 7: CreateCustomJobSampleTest.testCreateCustomJobSample » InvalidArgument io.grpc....
[ERROR]   Run 8: CreateCustomJobSampleTest.tearDown:82 » NullPointer
[ERROR]   Run 9: CreateCustomJobSampleTest.testCreateCustomJobSample » InvalidArgument io.grpc....
[ERROR]   Run 10: CreateCustomJobSampleTest.tearDown:82 » NullPointer
[ERROR] aiplatform.CreateHyperparameterTuningJobSampleTest.testCreateHyperparameterTuningJobSample
[ERROR]   Run 1: CreateHyperparameterTuningJobSampleTest.testCreateHyperparameterTuningJobSample » InvalidArgument
[ERROR]   Run 2: CreateHyperparameterTuningJobSampleTest.testCreateHyperparameterTuningJobSample » InvalidArgument
[ERROR]   Run 3: CreateHyperparameterTuningJobSampleTest.testCreateHyperparameterTuningJobSample » InvalidArgument
[ERROR]   Run 4: CreateHyperparameterTuningJobSampleTest.testCreateHyperparameterTuningJobSample » InvalidArgument
[ERROR]   Run 5: CreateHyperparameterTuningJobSampleTest.testCreateHyperparameterTuningJobSample » InvalidArgument
[ERROR]   Run 6: CreateHyperparameterTuningJobSampleTest.testCreateHyperparameterTuningJobSample » InvalidArgument
[ERROR]   Run 7: CreateHyperparameterTuningJobSampleTest.testCreateHyperparameterTuningJobSample » InvalidArgument
[ERROR]   Run 8: CreateHyperparameterTuningJobSampleTest.testCreateHyperparameterTuningJobSample » InvalidArgument
[ERROR]   Run 9: CreateHyperparameterTuningJobSampleTest.testCreateHyperparameterTuningJobSample » InvalidArgument
[ERROR]   Run 10: CreateHyperparameterTuningJobSampleTest.testCreateHyperparameterTuningJobSample » InvalidArgument

[Sita04]

@lee1premium Thanks for the sample. The associated issue is been looked into.