Make `default_array_save_base` `False`

[braingram]

This would be a major/breaking change.

We currently have default_array_save_base to True:

asdf/asdf/config.py

Line 27 in 7ff17bb

DEFAULT_DEFAULT_ARRAY_SAVE_BASE = True

to match previous asdf behavior (where a view of an array saves the base array). However this results in unexpectedly large files. I suggest that we switch this default to False and rely on users to default set_array_save_base if they want to save a "view" (and the base array).

If not already covered by tests/API we should first check that this option "round-trips".

[braingram]

xref: #1005