[Infrastructure] Wipe integration test resources and surface exceptions gracefully

[ghost]

Currently many of our integration tests for our processors (text embedding, text image embedding, sparse encoding) follow the following pattern to create and cleanup resources

public void processor_integrationTest() {
    try {
        // load model
        // create pipeline/index
        // do tests/asserts
    } finally {
        // cleanup pipeline, index, model
    }
}

However, this causes issues like #1091 where if the integration tests fail in the try block before creating the pipeline, it will enter the finally block and attempt to delete the nonexistent pipeline. This causes an exception in the cleanup and masks the true exception, such as #1093 where the root issue is a memory circuit breaker trigger which is unclear from the test report.

We should rework our integration test cleanup so we can:

• Log errors more clearly during resource cleanup to avoid confusion
• Resource cleanup after every test rather than a part of every test, so cleanup won't directly cause test failures

[q-andy]

Hi, I switched GitHub accounts and deleted my other one, for questions about this issue you can contact me instead

[heemin32]

Similar to https://github.com/opensearch-project/k-NN/blob/main/src/testFixtures/java/org/opensearch/knn/ODFERestTestCase.java#L152

[WeijiaZhao]

I will take a look at this issue