Dataproc tests should use tf-test prefix so resources can be cleaned up

[melinath]

Occasionally tests fail and leave behind resource in our test environments. We automatically clean up resources with a tf-test prefix on a regular basis. However, some Dataproc tests currently use a tf-dataproc prefix, which does not automatically get cleaned up. Although the random suffixes on the resource ids will generally prevent conflicts, this may eventually cause quota issues.

The Dataproc tests that use tf-dataproc as the prefix should be updated to start with tf-test

b/309162860#comment7

b/309934501

[github-actions]

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