Fix bug caching requests with pyvo request_hooks

[emellega]

When we migrated the ESASky module to use EsaTap/PyVO we noticed some weird errors for some of our requests that we didn't have before. When downloading images through the ESASky module we got Pyvo errors saying that we didn't conform to the TAP spec. It turns out that when we do a deep copy on the response (which contains the request hooks) during caching, it triggers something within Pyvo to do that validation.

I guess this is more of a workaround around something that is broken within pyvo rather than an actual bug fix. Let me know if you find this acceptable, or if you would rather see a proper fix within pyvo.

[codecov]

Codecov Report

❌ Patch coverage is 84.61538% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.22%. Comparing base (a1fee2a) to head (ae746f1).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
astroquery/query.py	84.61%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3586      +/-   ##
==========================================
- Coverage   73.22%   73.22%   -0.01%     
==========================================
  Files         226      226              
  Lines       21000    21007       +7     
==========================================
+ Hits        15378    15383       +5     
- Misses       5622     5624       +2     

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