rename auto-sklearn/autosklearn/pipeline/components/data_preprocessing/feature_reduction to auto-sklearn/autosklearn/pipeline/components/data_preprocessing/text_feature_reduction.

also rename corresponding feature reduction class FeatureReduction to TextFeatureReduction.
`auto-sklearn/autosklearn/pipeline/components/data_preprocessing/text_feature_reduction/truncated_svd.py:TextFeatureReduction`

This includes adapting all *csv and *json participating in metalearning

The "real" changes are limited to
  1. truncated_svd.py
  2. feature_type_text.py

Author: Louquinze