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[non-BE] fix for TCX5 ungrouping/interleaving when in_fs < out_fs

Jan Kiene requested to merge fhg/fix-tcx5-grouping-interleaving-with-in_fs-uneq-out_fs into main

Description

Fix for the TNS ungrouping and TCX5 spectrum interleaving for input_fs != output_fs. Fixes the described discontinuity in the signal shown in the issue #1348 (closed).

I tested all combinations of input_fs and output_fs and the fix is BE if input_fs >= output_fs and only takes effect if input_fs < output_fs (an then only in frames with TCX5 and TNS that is applied on the whitened signal, i.e. before SNS).

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