Storage Blob tsp conversion

[l0lawrence]

• With the tsp regeneration the operations have splatted out a lot of the previous param Models (BlobHttpHeaders, AppendPositionAccessConditions, BlobModifiedAccessConditions). They are now being kept in the _patch.py to maintain compatibility with the current convenience layer. However, because of this operation param change, a lot of the helper methods are not really necessary anymore and could be refactored and removed.