Accept MAST URIs as input to get_cloud_uris()

[snbianco]

This PR does the following:

• Allows users to input a MAST URI string as input for Observations.get_cloud_uri.
• Allows users to input a list of MAST URI strings as input for Observations.get_cloud_uris. Logs a warning if the user tries to provide filter criteria as well, since this won't be possible without a Table.
• Bugfix where users where unnecessarily warned about a query result limit while trying to fetch products in MastMissions.
• Bugfix where the functions to get cloud URIs fail if the MAST relative path cannot be returned. Now, it logs a warning and skips that particular data product.
• Added JWST to the list of cloud-hosted missions.
• Added both non-remote and remote test cases to increase coverage.

[codecov]

Codecov Report

Attention: Patch coverage is 96.15385% with 1 line in your changes missing coverage. Please review.

Project coverage is 68.72%. Comparing base (46ca592) to head (01c38df).
Report is 13 commits behind head on main.

Files with missing lines	Patch %	Lines
astroquery/mast/cloud.py	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3193      +/-   ##
==========================================
+ Coverage   68.18%   68.72%   +0.54%     
==========================================
  Files         231      231              
  Lines       19048    19201     +153     
==========================================
+ Hits        12987    13196     +209     
+ Misses       6061     6005      -56     

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[snbianco]

Tagging @bmorris3 and @dr-rodriguez for visibility