Implement batching in Observations.get_product_list and add batch_size parameter

[snbianco]

Add batch_size parameter to MastMissions.get_product_list, Observations.get_product_list, and utils.resolve_object to allow controlling the number of items sent in each batch request to the server. This can help avoid timeouts or connection errors for large requests.

I also did some refactoring in the MastMissions module to make it more consistent with Observations as far as what is returned by get_product_list_async.

[codecov]

Codecov Report

❌ Patch coverage is 96.15385% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 70.73%. Comparing base (91fad25) to head (27967f7).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
astroquery/mast/missions.py	90.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3454      +/-   ##
==========================================
+ Coverage   70.72%   70.73%   +0.01%     
==========================================
  Files         232      232              
  Lines       20041    20040       -1     
==========================================
+ Hits        14174    14176       +2     
+ Misses       5867     5864       -3     

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[Copilot]

.

[bsipocz]

Please don't prompt copilot to add noise here.

[snbianco]

Oops, sorry!