EUCLIDPCR-2103 update get_product_list method

[Enriquerzrz]

• Now when the requested product_type at get_product_list method belongs to BASIC_DOWNLOAD_DATA_PRODUCTS, the method now also returns the file_name_list column.
• Added new simple check at the tests

Related Issue: ISSUE-3512
Jira: EUCLIDPCR-2103
CC: @esdc-esac-esa-int

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.76%. Comparing base (b50cfc8) to head (acca860).
⚠️ Report is 34 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3562   +/-   ##
=======================================
  Coverage   72.76%   72.76%           
=======================================
  Files         219      219           
  Lines       20543    20543           
=======================================
  Hits        14948    14948           
  Misses       5595     5595           

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[bsipocz]

This looks good with a super minor changelog comment.

Thank you!