feat: Add support for the new Pre-Translate Efficiency Report

[Besomhead]

• Created request structure for pre-translate-efficiency reports
• Removed deprecated requests
• Updated response structure and tests

Covers #257.

Note: requests for report types "translation-costs-pe" and "contribution-raw-data" are yet to be covered.

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.47%. Comparing base (a7981ef) to head (77c6b54).
Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #265      +/-   ##
============================================
+ Coverage     93.26%   93.47%   +0.21%     
- Complexity      721      726       +5     
============================================
  Files           181      178       -3     
  Lines          2359     2355       -4     
  Branches         48       50       +2     
============================================
+ Hits           2200     2201       +1     
+ Misses          135      130       -5     
  Partials         24       24              

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[andrii-bodnar]

@Besomhead thank you!