[ENH] add feature scaling support for EncoderDecoderDataModule

[PranavBhatP]

Reference Issues/PRs

fixes #1979

What does this implement/fix? Explain your changes.

Implements feature scaling for continuous targets and features in the D2 layer using scalers and target_normalizer params.

What should a reviewer concentrate their feedback on?

PR checklist

• The PR title starts with either [ENH], [MNT], [DOC], or [BUG]. [BUG] - bugfix, [MNT] - CI, test framework, [ENH] - adding or improving code, [DOC] - writing or improving documentation or docstrings.
• Added/modified tests
• Used pre-commit hooks when committing to ensure that code is compliant with hooks. Install hooks with pre-commit install.
  To run hooks independent of commit, execute pre-commit run --all-files