Use NumPy recommended approach to out-of-bounds integer conversion

[brandonwillard]

This PR fixes new deprecation errors caused by certain types of conversions to out-of-bounds integers to integer arrays.

The error is as follows:

DeprecationWarning: NumPy will stop allowing conversion of out-of-bound Python integers to integer arrays.  The conversion of 255 to int8 will fail in the future.
For the old behavior, usually:
    np.array(value).astype(dtype)`
will give the desired result (the cast overflows).

[codecov]

Codecov Report

Merging #1496 (526b185) into main (ad7a8b7) will decrease coverage by 0.03%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1496      +/-   ##
==========================================
- Coverage   75.09%   75.06%   -0.03%     
==========================================
  Files         194      176      -18     
  Lines       50151    49447     -704     
  Branches    12108    11968     -140     
==========================================
- Hits        37660    37118     -542     
+ Misses      10170    10036     -134     
+ Partials     2321     2293      -28     

Impacted Files	Coverage Δ
aesara/misc/safe_asarray.py	69.23% <100.00%> (ø)

... and 19 files with indirect coverage changes