What needs to happen?

When evaluating ParDo operations in the TransformTranslator in Apache Spark Runner, too many filter operations are applied.
The reason for applying filter operations is that a ParDo can have multiple outputs, so we apply filter operations to filter only elements such as each TupleTag.

However, the filter operation is also applied to a ParDo with a single output, which can have a performance impact.
Therefore, we should avoid applying the filter operation when evaluating ParDo operations with a single output.

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Issue Priority

Priority: 2 (default / most normal work should be filed as P2)

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